21246562 has 16 divisors (see below), whose sum is σ = 32519232. Its totient is φ = 10409200.

The previous prime is 21246557. The next prime is 21246581. The reversal of 21246562 is 26564212.

It is a self number, because there is not a number n which added to its sum of digits gives 21246562.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21123 + ... + 22105.

It is an arithmetic number, because the mean of its divisors is an integer number (2032452).

Almost surely, 2^21246562 is an apocalyptic number.

21246562 is a deficient number, since it is larger than the sum of its proper divisors (11272670).

21246562 is a wasteful number, since it uses less digits than its factorization.

21246562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193.

The product of its digits is 5760, while the sum is 28.

The square root of 21246562 is about 4609.3993101054. The cubic root of 21246562 is about 276.9679745065.

The spelling of 21246562 in words is "twenty-one million, two hundred forty-six thousand, five hundred sixty-two".