21074625 has 96 divisors (see below), whose sum is σ = 44972928. Its totient is φ = 9360000.

The previous prime is 21074597. The next prime is 21074633. The reversal of 21074625 is 52647012.

It is not a de Polignac number, because 21074625 - 2¹⁴ = 21058241 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 160810 + ... + 160940.

It is an arithmetic number, because the mean of its divisors is an integer number (468468).

Almost surely, 2^21074625 is an apocalyptic number.

21074625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21074625 is an abundant number, since it is smaller than the sum of its proper divisors (23898303).

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

21074625 is a wasteful number, since it uses less digits than its factorization.

21074625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 21074625 is about 4590.7107292880. The cubic root of 21074625 is about 276.2188324344.

The spelling of 21074625 in words is "twenty-one million, seventy-four thousand, six hundred twenty-five".