25120257 has 8 divisors (see below), whose sum is σ = 33547584. Its totient is φ = 16719888.

The previous prime is 25120247. The next prime is 25120273. The reversal of 25120257 is 75202152.

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

It is not a de Polignac number, because 25120257 - 2⁴ = 25120241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25120217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4453 + ... + 8370.

It is an arithmetic number, because the mean of its divisors is an integer number (4193448).

Almost surely, 2^25120257 is an apocalyptic number.

It is an amenable number.

25120257 is a deficient number, since it is larger than the sum of its proper divisors (8427327).

25120257 is a wasteful number, since it uses less digits than its factorization.

25120257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13479.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 25120257 is about 5012.0112729323. The cubic root of 25120257 is about 292.8698688671.

The spelling of 25120257 in words is "twenty-five million, one hundred twenty thousand, two hundred fifty-seven".