25157420 has 24 divisors (see below), whose sum is σ = 53161584. Its totient is φ = 9999936.

The previous prime is 25157411. The next prime is 25157443. The reversal of 25157420 is 2475152.

It is a self number, because there is not a number n which added to its sum of digits gives 25157420.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 599 + ... + 7118.

It is an arithmetic number, because the mean of its divisors is an integer number (2215066).

Almost surely, 2^25157420 is an apocalyptic number.

25157420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25157420 is an abundant number, since it is smaller than the sum of its proper divisors (28004164).

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

25157420 is a wasteful number, since it uses less digits than its factorization.

25157420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7889 (or 7887 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 25157420 is about 5015.7172966586. The cubic root of 25157420 is about 293.0142219564.

The spelling of 25157420 in words is "twenty-five million, one hundred fifty-seven thousand, four hundred twenty".