21725074 has 8 divisors (see below), whose sum is σ = 37243008. Its totient is φ = 9310740.

The previous prime is 21725063. The next prime is 21725101. The reversal of 21725074 is 47052712.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 775882 + ... + 775909.

It is an arithmetic number, because the mean of its divisors is an integer number (4655376).

Almost surely, 2^21725074 is an apocalyptic number.

21725074 is a deficient number, since it is larger than the sum of its proper divisors (15517934).

21725074 is a wasteful number, since it uses less digits than its factorization.

21725074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551800.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 21725074 is about 4661.0164127581. The cubic root of 21725074 is about 279.0318347731.

Adding to 21725074 its reverse (47052712), we get a palindrome (68777786).

The spelling of 21725074 in words is "twenty-one million, seven hundred twenty-five thousand, seventy-four".