25197956 has 36 divisors (see below), whose sum is σ = 52189200. Its totient is φ = 10611216.

The previous prime is 25197937. The next prime is 25197959. The reversal of 25197956 is 65979152.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25197959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10475 + ... + 12653.

It is an arithmetic number, because the mean of its divisors is an integer number (1449700).

Almost surely, 2^25197956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25197956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26094600).

25197956 is an abundant number, since it is smaller than the sum of its proper divisors (26991244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25197956 is a wasteful number, since it uses less digits than its factorization.

25197956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256 (or 2247 counting only the distinct ones).

The product of its digits is 170100, while the sum is 44.

The square root of 25197956 is about 5019.7565678029. The cubic root of 25197956 is about 293.1715148579.

The spelling of 25197956 in words is "twenty-five million, one hundred ninety-seven thousand, nine hundred fifty-six".