Properties of the Number 21454

Twenty-One Thousand Four Hundred Fifty-Four

Basics

Value: 21453 → 21454 → 21455

Parity: even

Prime: No

Previous Prime: 21433

Next Prime: 21467

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 17 × 631

Divisors: 1, 2, 17, 34, 631, 1262, 10727, 21454

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001111001110

Octal: 51716

Duodecimal: 104BA

Hexadecimal: 53ce

Square: 460274116

Square Root: 146.47184029703456

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(n) = (-2 - (-1)ⁿ*(-2 + n) + n + 2·n³)/4. A323723

The number of vertices formed on an isosceles triangle by straight line segments mutually connecting all vertices and all points that divide the two equal length sides into n equal parts; the base of the triangle contains no points other than its vertices. A333026

Expansion of ∏_k>=1 ((1 - 2^k*x^k)/(1 + 2^k*x^k))^{1/2^k}. A303439

Generating function: 1/((1-x)*(1-x²)²*(1-x³)³*(1-x⁴)⁴). A64349

Number of two-rowed partitions of length 6. A70559

Numbers k such that k⁴⁰⁹⁶ + (k+1)⁴⁰⁹⁶ is prime. A274236

A generalized partition function. A2598

Numbers such that the nonzero product of the digits of its 4th power is also a 4th power. A66734

Number of binary strings of length n with no substrings equal to 0010 1011 or 1100. A164502

Number of nondecreasing strings of numbers x(i=1..n) in -5..5 with sum x(i)³ equal to 0. A188273