21125074 has 32 divisors (see below), whose sum is σ = 35020800. Its totient is φ = 9519120.

The previous prime is 21125057. The next prime is 21125087. The reversal of 21125074 is 47052112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92949 + ... + 93175.

It is an arithmetic number, because the mean of its divisors is an integer number (1094400).

Almost surely, 2^21125074 is an apocalyptic number.

21125074 is a deficient number, since it is larger than the sum of its proper divisors (13895726).

21125074 is a wasteful number, since it uses less digits than its factorization.

21125074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 21125074 is about 4596.2021278442. The cubic root of 21125074 is about 276.4390634681.

Adding to 21125074 its reverse (47052112), we get a palindrome (68177186).

The spelling of 21125074 in words is "twenty-one million, one hundred twenty-five thousand, seventy-four".