Properties of the Number 40139

Forty Thousand One Hundred Thirty-Nine

Basics

Value: 40138 → 40139 → 40140

Parity: odd

Prime: No

Previous Prime: 40129

Next Prime: 40151

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 11 × 41 × 89

Divisors: 1, 11, 41, 89, 451, 979, 3649, 40139

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001110011001011

Octal: 116313

Duodecimal: 1B28B

Hexadecimal: 9ccb

Square: 1611139321

Square Root: 200.3471986327735

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

(1/4) * number of ways to select 3 distinct collinear points from a square of grid points with side length n. A320540

a(n) = a(n-1) + 3·a(n-2) -2·a(n-3) - 2·a(n-4), where a(0) = -2, a(1) = 1, a(2) = 0, a(3) = 1. A295860

Number of ways to write n as an ordered sum of 7 primes (counting 1 as a prime). A341986

a(n) = 1331·n - 1122. A157441

Integers that do not appear in A103502. A103504

a(n) = (p-1)! mod p² where p = n-th prime. A112660

Irregular triangle read by rows: the number of hydrocarbon structures that can be drawn with a given number of carbons and units of unsaturation. A134819

Number of (n+1)X(n+1) -10..10 symmetric matrices with every 2X2 subblock having sum zero and one or three distinct values. A211815

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 549", based on the 5-celled von Neumann neighborhood. A272844

Continued fraction for sqrt(152). A40139