21246862 has 16 divisors (see below), whose sum is σ = 39225312. Its totient is φ = 8405280.

The previous prime is 21246857. The next prime is 21246893. The reversal of 21246862 is 26864212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58189 + ... + 58552.

It is an arithmetic number, because the mean of its divisors is an integer number (2451582).

Almost surely, 2^21246862 is an apocalyptic number.

21246862 is a deficient number, since it is larger than the sum of its proper divisors (17978450).

21246862 is a wasteful number, since it uses less digits than its factorization.

21246862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116763.

The product of its digits is 9216, while the sum is 31.

The square root of 21246862 is about 4609.4318521918. The cubic root of 21246862 is about 276.9692780900.

It can be divided in two parts, 212 and 46862, that added together give a palindrome (47074).

The spelling of 21246862 in words is "twenty-one million, two hundred forty-six thousand, eight hundred sixty-two".