25631249 has 8 divisors (see below), whose sum is σ = 29694720. Its totient is φ = 21668256.

The previous prime is 25631233. The next prime is 25631279. The reversal of 25631249 is 94213652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25631249 - 2⁴ = 25631233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25631219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24569 + ... + 25590.

It is an arithmetic number, because the mean of its divisors is an integer number (3711840).

Almost surely, 2^25631249 is an apocalyptic number.

It is an amenable number.

25631249 is a deficient number, since it is larger than the sum of its proper divisors (4063471).

25631249 is an equidigital number, since it uses as much as digits as its factorization.

25631249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50239.

The product of its digits is 12960, while the sum is 32.

The square root of 25631249 is about 5062.7313774286. The cubic root of 25631249 is about 294.8423901935.

The spelling of 25631249 in words is "twenty-five million, six hundred thirty-one thousand, two hundred forty-nine".