21260562 has 16 divisors (see below), whose sum is σ = 42857472. Its totient is φ = 7030800.

The previous prime is 21260549. The next prime is 21260609. The reversal of 21260562 is 26506212.

It is a super-2 number, since 2×21260562² = 904022993111688, which contains 22 as substring.

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, 13189 + ... + 14712.

It is an arithmetic number, because the mean of its divisors is an integer number (2678592).

Almost surely, 2^21260562 is an apocalyptic number.

21260562 is an abundant number, since it is smaller than the sum of its proper divisors (21596910).

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

21260562 is a wasteful number, since it uses less digits than its factorization.

21260562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28033.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 21260562 is about 4610.9176960774. The cubic root of 21260562 is about 277.0287953313.

Adding to 21260562 its reverse (26506212), we get a palindrome (47766774).

The spelling of 21260562 in words is "twenty-one million, two hundred sixty thousand, five hundred sixty-two".