21248592 has 40 divisors (see below), whose sum is σ = 55279200. Its totient is φ = 7032960.

The previous prime is 21248587. The next prime is 21248597. The reversal of 21248592 is 29584212.

It is an interprime number because it is at equal distance from previous prime (21248587) and next prime (21248597).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21248597) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5667 + ... + 8637.

It is an arithmetic number, because the mean of its divisors is an integer number (1381980).

Almost surely, 2^21248592 is an apocalyptic number.

It is an amenable number.

21248592 is an abundant number, since it is smaller than the sum of its proper divisors (34030608).

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

21248592 is a wasteful number, since it uses less digits than its factorization.

21248592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131 (or 3125 counting only the distinct ones).

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

The square root of 21248592 is about 4609.6195070743. The cubic root of 21248592 is about 276.9767951820.

The spelling of 21248592 in words is "twenty-one million, two hundred forty-eight thousand, five hundred ninety-two".