25630257 has 8 divisors (see below), whose sum is σ = 35659584. Its totient is φ = 16343888.

The previous prime is 25630243. The next prime is 25630261. The reversal of 25630257 is 75203652.

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 25630257 - 2²³ = 17241649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25630057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185658 + ... + 185795.

It is an arithmetic number, because the mean of its divisors is an integer number (4457448).

Almost surely, 2^25630257 is an apocalyptic number.

It is an amenable number.

25630257 is a deficient number, since it is larger than the sum of its proper divisors (10029327).

25630257 is a wasteful number, since it uses less digits than its factorization.

25630257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371479.

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 25630257 is about 5062.6334056497. The cubic root of 25630257 is about 294.8385864066.

The spelling of 25630257 in words is "twenty-five million, six hundred thirty thousand, two hundred fifty-seven".