21374325 has 72 divisors (see below), whose sum is σ = 44955456. Its totient is φ = 9504000.

The previous prime is 21374299. The next prime is 21374333. The reversal of 21374325 is 52347312.

It is not a de Polignac number, because 21374325 - 2⁵ = 21374293 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 64410 + ... + 64740.

Almost surely, 2^21374325 is an apocalyptic number.

21374325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21374325 is an abundant number, since it is smaller than the sum of its proper divisors (23581131).

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

21374325 is a wasteful number, since it uses less digits than its factorization.

21374325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 387 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 21374325 is about 4623.2375020109. The cubic root of 21374325 is about 277.5220337995.

The spelling of 21374325 in words is "twenty-one million, three hundred seventy-four thousand, three hundred twenty-five".