23264721 has 48 divisors (see below), whose sum is σ = 38413440. Its totient is φ = 13478400.

The previous prime is 23264719. The next prime is 23264737. The reversal of 23264721 is 12746232.

It is not a de Polignac number, because 23264721 - 2¹ = 23264719 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23264701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 153996 + ... + 154146.

It is an arithmetic number, because the mean of its divisors is an integer number (800280).

Almost surely, 2^23264721 is an apocalyptic number.

It is an amenable number.

23264721 is a deficient number, since it is larger than the sum of its proper divisors (15148719).

23264721 is a wasteful number, since it uses less digits than its factorization.

23264721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 243 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 23264721 is about 4823.3516355331. The cubic root of 23264721 is about 285.4735985270.

The spelling of 23264721 in words is "twenty-three million, two hundred sixty-four thousand, seven hundred twenty-one".