21292752 has 40 divisors (see below), whose sum is σ = 59239264. Its totient is φ = 6551424.

The previous prime is 21292751. The next prime is 21292759. The reversal of 21292752 is 25729212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21292751) 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 in 7 ways as a sum of consecutive naturals, for example, 16438 + ... + 17685.

Almost surely, 2^21292752 is an apocalyptic number.

It is an amenable number.

21292752 is an abundant number, since it is smaller than the sum of its proper divisors (37946512).

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

21292752 is a wasteful number, since it uses less digits than its factorization.

21292752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34147 (or 34141 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 21292752 is about 4614.4070041556. The cubic root of 21292752 is about 277.1685385814.

The spelling of 21292752 in words is "twenty-one million, two hundred ninety-two thousand, seven hundred fifty-two".