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Properties of the Number -15405

Fifteen Thousand Four Hundred Five

Basics

Value: -15406 → -15405 → -15404

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 13 × 79

Divisors: 1, 3, 5, 13, 15, 39, 65, 79, 195, 237

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11110000101101

Octal: -36055

Duodecimal: -8AB9

Hexadecimal: -3c2d

Square: 237314025

Square Root: 124.1168803990819

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

Largest number not the sum of distinct n-th-order polygonal numbers. A7419
Number of unlabeled simple graphs with n vertices whose edge-set is not connected. A327235
Nonnegative values·of solutions (x, y) to the Diophantine equation x2 + (x+487)2 = y2. A207076
Group the composite numbers so that the sum of the n-th group is a multiple of the n-th prime: (4), (6), (8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22), (24, 25), (26, 27, 28, 30, 32), (33, 34, ...), ... Sequence gives sum of n-th group. A74124
Products p·q*r·s of distinct primes for which (p·q*r·s + 1)/2 is prime. A234501
Sum of all parts of all partitions of n with designated summands. A386998
Number of strict integer compositions of n whose leaders of increasing runs are increasing. A376263
Conjectured formula for irreducible 6-fold Euler sums of weight 2n+16. A19459
Numbers m such that π(m) = d1!!*d2!!*...*dk!! where d1 d2 ... dk is the decimal expansion of m. A139182
Number of (2+1)X(n+1) 0..3 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with values 0..3 introduced in row major order. A231452