25831245 has 32 divisors (see below), whose sum is σ = 47744640. Its totient is φ = 11786240.

The previous prime is 25831237. The next prime is 25831249. The reversal of 25831245 is 54213852.

It is not a de Polignac number, because 25831245 - 2³ = 25831237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25831249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1800 + ... + 7409.

It is an arithmetic number, because the mean of its divisors is an integer number (1492020).

Almost surely, 2^25831245 is an apocalyptic number.

It is an amenable number.

25831245 is a deficient number, since it is larger than the sum of its proper divisors (21913395).

25831245 is a wasteful number, since it uses less digits than its factorization.

25831245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9245.

The product of its digits is 9600, while the sum is 30.

The square root of 25831245 is about 5082.4447857306. Note that the first 3 decimals coincide. The cubic root of 25831245 is about 295.6072715002.

It can be divided in two parts, 2583 and 1245, that added together give a triangular number (3828 = T₈₇).

The spelling of 25831245 in words is "twenty-five million, eight hundred thirty-one thousand, two hundred forty-five".