21410572 has 6 divisors (see below), whose sum is σ = 37468508. Its totient is φ = 10705284.

The previous prime is 21410563. The next prime is 21410579. The reversal of 21410572 is 27501412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21410579) by changing a digit.

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 as a sum of consecutive naturals, namely, 2676318 + ... + 2676325.

Almost surely, 2^21410572 is an apocalyptic number.

It is an amenable number.

21410572 is a deficient number, since it is larger than the sum of its proper divisors (16057936).

21410572 is a wasteful number, since it uses less digits than its factorization.

21410572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352647 (or 5352645 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 21410572 is about 4627.1559299423. The cubic root of 21410572 is about 277.6788209766.

Adding to 21410572 its reverse (27501412), we get a palindrome (48911984).

The spelling of 21410572 in words is "twenty-one million, four hundred ten thousand, five hundred seventy-two".