23991265 has 8 divisors (see below), whose sum is σ = 29782440. Its totient is φ = 18531072.

The previous prime is 23991263. The next prime is 23991283. The reversal of 23991265 is 56219932.

It can be written as a sum of positive squares in 4 ways, for example, as 20449 + 23970816 = 143^2 + 4896^2 .

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 23991265 - 2¹ = 23991263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23991263) 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, 82584 + ... + 82873.

It is an arithmetic number, because the mean of its divisors is an integer number (3722805).

Almost surely, 2^23991265 is an apocalyptic number.

It is an amenable number.

23991265 is a deficient number, since it is larger than the sum of its proper divisors (5791175).

23991265 is a wasteful number, since it uses less digits than its factorization.

23991265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165491.

The product of its digits is 29160, while the sum is 37.

The square root of 23991265 is about 4898.0878922290. The cubic root of 23991265 is about 288.4149152318.

The spelling of 23991265 in words is "twenty-three million, nine hundred ninety-one thousand, two hundred sixty-five".