10521986 has 8 divisors (see below), whose sum is σ = 16209660. Its totient is φ = 5118768.

The previous prime is 10521947. The next prime is 10522007. The reversal of 10521986 is 68912501.

It can be written as a sum of positive squares in 2 ways, for example, as 10336225 + 185761 = 3215^2 + 431^2 .

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

It is a super-2 number, since 2×10521986² = 221424378768392, which contains 22 as substring.

It is a Curzon 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, 71021 + ... + 71168.

Almost surely, 2^10521986 is an apocalyptic number.

10521986 is a deficient number, since it is larger than the sum of its proper divisors (5687674).

10521986 is a wasteful number, since it uses less digits than its factorization.

10521986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142228.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 10521986 is about 3243.7610886130. The cubic root of 10521986 is about 219.1286887084.

The spelling of 10521986 in words is "ten million, five hundred twenty-one thousand, nine hundred eighty-six".