23591261 has 4 divisors (see below), whose sum is σ = 24616992. Its totient is φ = 22565532.

The previous prime is 23591221. The next prime is 23591287. The reversal of 23591261 is 16219532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23591261 - 2²² = 19396957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23591221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512831 + ... + 512876.

It is an arithmetic number, because the mean of its divisors is an integer number (6154248).

Almost surely, 2^23591261 is an apocalyptic number.

It is an amenable number.

23591261 is a deficient number, since it is larger than the sum of its proper divisors (1025731).

23591261 is a wasteful number, since it uses less digits than its factorization.

23591261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025730.

The product of its digits is 3240, while the sum is 29.

The square root of 23591261 is about 4857.0835899745. The cubic root of 23591261 is about 286.8030189332.

The spelling of 23591261 in words is "twenty-three million, five hundred ninety-one thousand, two hundred sixty-one".