25525 has 6 divisors (see below), whose sum is σ = 31682. Its totient is φ = 20400.

The previous prime is 25523. The next prime is 25537. The reversal of 25525 is 52552.

It can be written as a sum of positive squares in 3 ways, for example, as 2116 + 23409 = 46^2 + 153^2 .

It is not a de Polignac number, because 25525 - 2¹ = 25523 is a prime.

It is a Duffinian number.

25525 is a lucky number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 486 + ... + 535.

2²⁵⁵²⁵ is an apocalyptic number.

25525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25525 is a deficient number, since it is larger than the sum of its proper divisors (6157).

25525 is a wasteful number, since it uses less digits than its factorization.

25525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031 (or 1026 counting only the distinct ones).

The product of its digits is 500, while the sum is 19.

The square root of 25525 is about 159.7654530867. The cubic root of 25525 is about 29.4434423403.

The spelling of 25525 in words is "twenty-five thousand, five hundred twenty-five".