25145856 has 160 divisors (see below), whose sum is σ = 79548480. Its totient is φ = 7815168.

The previous prime is 25145849. The next prime is 25145881. The reversal of 25145856 is 65854152.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 25145856.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234955 + ... + 235061.

It is an arithmetic number, because the mean of its divisors is an integer number (497178).

Almost surely, 2^25145856 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 25145856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39774240).

25145856 is an abundant number, since it is smaller than the sum of its proper divisors (54402624).

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

25145856 is a wasteful number, since it uses less digits than its factorization.

25145856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 129 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 25145856 is about 5014.5643878606. The cubic root of 25145856 is about 292.9693188917.

The spelling of 25145856 in words is "twenty-five million, one hundred forty-five thousand, eight hundred fifty-six".