25420128 has 24 divisors (see below), whose sum is σ = 66728088. Its totient is φ = 8473344.

The previous prime is 25420099. The next prime is 25420139. The reversal of 25420128 is 82102452.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 25420098 and 25420107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132301 + ... + 132492.

It is an arithmetic number, because the mean of its divisors is an integer number (2780337).

Almost surely, 2^25420128 is an apocalyptic number.

It is an amenable number.

25420128 is an abundant number, since it is smaller than the sum of its proper divisors (41307960).

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

25420128 is a wasteful number, since it uses less digits than its factorization.

25420128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264806 (or 264798 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 25420128 is about 5041.8377601823. The cubic root of 25420128 is about 294.0306321917.

The spelling of 25420128 in words is "twenty-five million, four hundred twenty thousand, one hundred twenty-eight".