Properties of the Number 15478

Fifteen Thousand Four Hundred Seventy-Eight

Basics

Value: 15477 → 15478 → 15479

Parity: even

Prime: No

Previous Prime: 15473

Next Prime: 15493

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 71 × 109

Divisors: 1, 2, 71, 109, 142, 218, 7739, 15478

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11110001110110

Octal: 36166

Duodecimal: 8B5A

Hexadecimal: 3c76

Square: 239568484

Square Root: 124.41061047997474

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

a(0)=0, a(1)=1, a(2)=1, a(3)=1, a(n) = a(n-3) + a(n-4) for n > 3. A79398

a(n) = T(2·n-1, n-2), where T is given by A026584. A26594

Number of ways to tile a 5 X 2n room with 1x2 Tatami mats. At most 3 Tatami mats may meet at a point. A68924

Position where 10ⁿ-1 occurs in the Kaprekar sequence A006886. A193992

Number of lines through at least 2 points of a 9 X n grid of points. A160849

The Padovan sequence A000931 doubled. A291289

Positive integers that have exactly nine representations of the form 1 + p1 * (1 + p2* ... * (1 + p_j)...), where [p1, ..., p_j] is a (possibly empty) list of distinct primes. A317399

Number of 4-element subsets of [n] whose sum is a triangular number. A320850

Centered heptagonal numbers which are sphenic numbers. A360183

a(n) = ∑_k=m..n T(k,n-k), where m = floor((n+1)/2); a(n) is the n-th diagonal-sum of left justified array T given by A027948. A27959