Properties of the Number 25978

Twenty-Five Thousand Nine Hundred Seventy-Eight

Basics

Value: 25977 → 25978 → 25979

Parity: even

Prime: No

Previous Prime: 25969

Next Prime: 25981

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 × 31 × 419

Divisors: 1, 2, 31, 62, 419, 838, 12989, 25978

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110010101111010

Octal: 62572

Duodecimal: 1304A

Hexadecimal: 657a

Square: 674856484

Square Root: 161.17692142487397

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

Number of non-self-conjugate partitions of n. A330644

Numbers k such that σ(φ(k)) = σ(k) where σ is the sum of divisors function A000203 and φ is the Euler totient function A000010. A33631

Expansion of ∏_{i>=1, j>=0} (1 + x^{i·5^j}). A373219

Cardinality of the set fⁿ({s}), where f is a variant of the Collatz function that replaces any element·in the argument set with both x/2 and 3·x+1, and s is an arbitrary irrational number. A208127

Number of positive integers <= 2ⁿ of form x² + 3 y². A205

Expansion of (1-3x)/(1-6x+8x²+x³). A114196

Numbers n such that σ(σ(φ(n))) = σ(σ(n)). A172466

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 118", based on the 5-celled von Neumann neighborhood. A270187

Numbers n whose cubes are concatenations n³ = x//y such that·is an anagram of y. A162946

Numbers k such that (19·10^k + 101) / 3 is prime. A276672