25537625 has 8 divisors (see below), whose sum is σ = 31871112. Its totient is φ = 20430000.

The previous prime is 25537609. The next prime is 25537639. The reversal of 25537625 is 52673552.

It can be written as a sum of positive squares in 4 ways, for example, as 327184 + 25210441 = 572^2 + 5021^2 .

It is not a de Polignac number, because 25537625 - 2⁴ = 25537609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102026 + ... + 102275.

It is an arithmetic number, because the mean of its divisors is an integer number (3983889).

Almost surely, 2^25537625 is an apocalyptic number.

25537625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25537625 is a deficient number, since it is larger than the sum of its proper divisors (6333487).

25537625 is an equidigital number, since it uses as much as digits as its factorization.

25537625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204316 (or 204306 counting only the distinct ones).

The product of its digits is 63000, while the sum is 35.

The square root of 25537625 is about 5053.4765261155. The cubic root of 25537625 is about 294.4829591115.

It can be divided in two parts, 25537 and 625, that added together give a palindrome (26162).

The spelling of 25537625 in words is "twenty-five million, five hundred thirty-seven thousand, six hundred twenty-five".