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Properties of the Number 12520

Twelve Thousand Five Hundred Twenty

Basics

Value: 12519 → 12520 → 12521

Parity: even

Prime: No

Previous Prime: 12517

Next Prime: 12527

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 3 × 5 × 313

Divisors: 1, 2, 4, 5, 8, 10, 20, 40, 313, 626

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

603 Try Today's Challenge

Representations

Binary: 11000011101000

Octal: 30350

Duodecimal: 72B4

Hexadecimal: 30e8

Square: 156750400

Square Root: 111.89280584559492

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

18-gonal (or octadecagonal) numbers: a(n) = n*(8·n-7). A51870
Numbers whose set of base 5 digits is {0,4}. A97251
Number of partitions of at most n into at most 5 parts. A2622
Triangle read by rows giving the sum of the number of k-matchings of the graphs obtained by deleting one edge and its two vertices from the ladder graph Ln = P2 X Pn in all possible ways. A318243
Numbers m such that [A070080(m), A070081(m), A070082(m)] is a right integer triangle. A70136
McKay-Thompson series of class 6B for the Monster group with a(0) = 12. A121665
Triangle T, read by rows, where g.f. of row n of matrix power T2n = (22n-1 + y)*yn-1 for n>0. A152790
Numbers k for which A003958(σ(k)) = 2·A003958(k), where A003958 is multiplicative with a(pe) = (p-1)e and σ is the sum of divisors function. A351447
a(1) = 1; a(n) = -∑k=2..n k3 * a(floor(n/k)). A360658
McKay-Thompson series of class 6B for Monster. A7255

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