10521804 has 12 divisors (see below), whose sum is σ = 24550904. Its totient is φ = 3507264.

The previous prime is 10521779. The next prime is 10521821. The reversal of 10521804 is 40812501.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×10521804² = 221416718828832, which contains 22 as substring.

It is a congruent number.

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, 438397 + ... + 438420.

Almost surely, 2^10521804 is an apocalyptic number.

It is an amenable number.

10521804 is an abundant number, since it is smaller than the sum of its proper divisors (14029100).

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

10521804 is a wasteful number, since it uses less digits than its factorization.

10521804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876824 (or 876822 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 10521804 is about 3243.7330346377. The cubic root of 10521804 is about 219.1274252698.

It can be divided in two parts, 10521 and 804, that added together give a triangular number (11325 = T₁₅₀).

The spelling of 10521804 in words is "ten million, five hundred twenty-one thousand, eight hundred four".