25751 has 4 divisors (see below), whose sum is σ = 28104. Its totient is φ = 23400.

The previous prime is 25747. The next prime is 25759. The reversal of 25751 is 15752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25751 - 2² = 25747 is a prime.

It is a super-2 number, since 2×25751² = 1326228002, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25751.

It is not an unprimeable number, because it can be changed into a prime (25759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1160 + ... + 1181.

It is an arithmetic number, because the mean of its divisors is an integer number (7026).

2²⁵⁷⁵¹ is an apocalyptic number.

25751 is a deficient number, since it is larger than the sum of its proper divisors (2353).

25751 is a wasteful number, since it uses less digits than its factorization.

25751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352.

The product of its digits is 350, while the sum is 20.

The square root of 25751 is about 160.4711812133. The cubic root of 25751 is about 29.5300851747.

Subtracting from 25751 its reverse (15752), we obtain a palindrome (9999).

The spelling of 25751 in words is "twenty-five thousand, seven hundred fifty-one".