1 Number Properties & Facts

One

Primality

Prime Factorization of 1
Number of Divisors in 1
1
1
Is 1 Prime?
No

Trigonometry

Sine of 1
0.8414709848079
Cosecant: 1.1883951057781
Cosine of 1
0.54030230586814
Secant: 1.8508157176809
Tangent of 1
1.5574077246549
Cotangent: 0.64209261593433

Functions

Square of 1
1
1 × 1 = 1
Square Root of 1
1
12 = 1
Natural Logarithm (ln) of 1
0
e0 = 1
Decimal Logarithm (log) of 1
0
100 = 1

Numeric Bases

1 in Binary
0b1
Base 2
1 in Octal
01
Base 8
1 in Hexadecimal
0x1
Base 16

Sequences

Is 1 a Fibonacci Number?
Yes: F2
Is 1 a Bell Number?
Yes: B1
Is 1 a Catalan Number?
Yes: C0, C1
Is 1 a Factorial?
Yes: 1!
Is 1 a Perfect Number?
No

Miscellaneous

Number of Significant Figures in 1
1
Hamming Weight of 1
1
Is 1 a Hamming (Regular) Number?
Yes
Is 1 a Humble Number?
Yes
Is 1 a Polygonal (s < 13) Number?
Triangular (1), Square (1), Pentagonal (1), Hexagonal (1), Heptagonal (1), Octagonal (1), Nonagonal (1), Decagonal (1), Hendecagonal (1), Dodecagonal (1)
Is 1 a Happy Number?
Yes
Is 1 a Self Describing Number?
No
Is 1 a Palindrome?
Yes
Is 1 a Münchhausen Number?
Yes
Is 1 an Eban Number?
No
Is 1 a Pernicious Number?
Yes
Is 1 a Attractive Number?
Yes
Is 1 a Perfect Square?
Yes
Is 1 a Perfect Power?
Yes