23042587 has 4 divisors (see below), whose sum is σ = 23067720. Its totient is φ = 23017456.

The previous prime is 23042581. The next prime is 23042597. The reversal of 23042587 is 78524032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23042587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23042581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11137 + ... + 13042.

It is an arithmetic number, because the mean of its divisors is an integer number (5766930).

Almost surely, 2^23042587 is an apocalyptic number.

23042587 is a deficient number, since it is larger than the sum of its proper divisors (25133).

23042587 is an equidigital number, since it uses as much as digits as its factorization.

23042587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25132.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 23042587 is about 4800.2694716026. The cubic root of 23042587 is about 284.5621140567.

The spelling of 23042587 in words is "twenty-three million, forty-two thousand, five hundred eighty-seven".