Properties of the Number 1025

One Thousand Twenty-Five

Basics

Value: 1024 → 1025 → 1026

Parity: odd

Prime: No

Previous Prime: 1021

Next Prime: 1031

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 5 ² × 41

Divisors: 1, 5, 25, 41, 205, 1025

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000000001

Octal: 2001

Duodecimal: 715

Hexadecimal: 401

Square: 1050625

Square Root: 32.01562118716424

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) = 2ⁿ + 1. A51

Moser-de Bruijn sequence: sums of distinct powers of 4. A695

a(n) = n² + 1. A2522

Unary-encoded compressed factorization of natural numbers. A156552

If n = p_i^e_i * ... * p_k^e_k, p_i < ... < p_k primes (with p_i = prime(i)), then a(n) = (1/2) * (e_i * 2ⁱ + ... + e_k * 2^k). A48675

Odd numbers of the form p^1+4k * r², where p is prime of the form 1+4m, r > 1, and gcd(p,r) = 1. (Euler's criteria for odd perfect numbers). A228058

a(n) = 4ⁿ + 1. A52539

Number of zero-one matrices with n ones and no zero rows or columns, up to permutation of rows. A116540

Sums of two distinct powers of 2. A18900

a(n) = 4·n² + 1. A53755