21298452 has 24 divisors (see below), whose sum is σ = 56796096. Its totient is φ = 6085248.

The previous prime is 21298447. The next prime is 21298471. The reversal of 21298452 is 25489212.

It is a congruent number.

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, 126693 + ... + 126860.

It is an arithmetic number, because the mean of its divisors is an integer number (2366504).

Almost surely, 2^21298452 is an apocalyptic number.

It is an amenable number.

21298452 is an abundant number, since it is smaller than the sum of its proper divisors (35497644).

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

21298452 is a wasteful number, since it uses less digits than its factorization.

21298452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253567 (or 253565 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 21298452 is about 4615.0245936506. The cubic root of 21298452 is about 277.1932687450.

The spelling of 21298452 in words is "twenty-one million, two hundred ninety-eight thousand, four hundred fifty-two".