21242862 has 12 divisors (see below), whose sum is σ = 46026240. Its totient is φ = 7080948.

The previous prime is 21242857. The next prime is 21242873. The reversal of 21242862 is 26824212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 590062 + ... + 590097.

It is an arithmetic number, because the mean of its divisors is an integer number (3835520).

Almost surely, 2^21242862 is an apocalyptic number.

21242862 is an abundant number, since it is smaller than the sum of its proper divisors (24783378).

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

21242862 is a wasteful number, since it uses less digits than its factorization.

21242862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180167 (or 1180164 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 21242862 is about 4608.9979388149. The cubic root of 21242862 is about 276.9518959680.

The spelling of 21242862 in words is "twenty-one million, two hundred forty-two thousand, eight hundred sixty-two".