25165420 has 36 divisors (see below), whose sum is σ = 61477920. Its totient is φ = 8627808.

The previous prime is 25165409. The next prime is 25165421. The reversal of 25165420 is 2456152.

It is not an unprimeable number, because it can be changed into a prime (25165421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11860 + ... + 13819.

It is an arithmetic number, because the mean of its divisors is an integer number (1707720).

Almost surely, 2^25165420 is an apocalyptic number.

25165420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25165420 is an abundant number, since it is smaller than the sum of its proper divisors (36312500).

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

25165420 is a wasteful number, since it uses less digits than its factorization.

25165420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25702 (or 25693 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 25165420 is about 5016.5147263813. The cubic root of 25165420 is about 293.0452779410.

The spelling of 25165420 in words is "twenty-five million, one hundred sixty-five thousand, four hundred twenty".