23260721 has 8 divisors (see below), whose sum is σ = 25965984. Its totient is φ = 20653920.

The previous prime is 23260717. The next prime is 23260733. The reversal of 23260721 is 12706232.

23260721 = 359² + 360² + ... + 487².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23260721 - 2² = 23260717 is a prime.

It is a super-2 number, since 2×23260721² = 1082122282879682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23260771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24116 + ... + 25061.

It is an arithmetic number, because the mean of its divisors is an integer number (3245748).

Almost surely, 2^23260721 is an apocalyptic number.

It is an amenable number.

23260721 is a deficient number, since it is larger than the sum of its proper divisors (2705263).

23260721 is a wasteful number, since it uses less digits than its factorization.

23260721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49231.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 23260721 is about 4822.9369682798. The cubic root of 23260721 is about 285.4572367025.

Adding to 23260721 its reverse (12706232), we get a palindrome (35966953).

The spelling of 23260721 in words is "twenty-three million, two hundred sixty thousand, seven hundred twenty-one".