Properties of the Number 1015

One Thousand Fifteen

Basics

Value: 1014 → 1015 → 1016

Parity: odd

Prime: No

Previous Prime: 1013

Next Prime: 1019

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 5 × 7 × 29

Divisors: 1, 5, 7, 29, 35, 145, 203, 1015

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110111

Octal: 1767

Duodecimal: 707

Hexadecimal: 3f7

Square: 1030225

Square Root: 31.85906464414798

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Square pyramidal numbers: a(n) = 0² + 1² + 2² + ... + n² = n*(n+1)*(2·n+1)/6. A330

a(n) = binomial(n+3, 3)/4 for odd n, n*(n+2)*(n+4)/24 for even n. A6918

Generalized 13-gonal numbers: m*(11·m-9)/2 with m = 0, 1, -1, 2, -2, 3, -3, ... A195313

Number of integer partitions of n whose differences (with the last part taken to be 0) are distinct. A325324

a(n) = n*(n + 6). A28560

a(n) = a(n-1) + a(floor(n/2)), a(1) = 1. A33485

Numbers having no more than one 0 in their binary representation. A89633

Numbers whose sum of digits is 7. A52221

Numbers k such that k, k + 1 and k + 2 are 3 consecutive Harshad numbers. A154701

13-gonal (or tridecagonal) numbers: a(n) = n*(11·n - 9)/2. A51865