23042565 has 96 divisors (see below), whose sum is σ = 52206336. Its totient is φ = 9123840.

The previous prime is 23042561. The next prime is 23042581. The reversal of 23042565 is 56524032.

23042565 is a `hidden beast` number, since 230 + 425 + 6 + 5 = 666.

It is not a de Polignac number, because 23042565 - 2² = 23042561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23042561) 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 95 ways as a sum of consecutive naturals, for example, 69450 + ... + 69780.

It is an arithmetic number, because the mean of its divisors is an integer number (543816).

Almost surely, 2^23042565 is an apocalyptic number.

It is an amenable number.

23042565 is an abundant number, since it is smaller than the sum of its proper divisors (29163771).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23042565 is a wasteful number, since it uses less digits than its factorization.

23042565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 23042565 is about 4800.2671800640. The cubic root of 23042565 is about 284.5620234944.

Adding to 23042565 its reverse (56524032), we get a palindrome (79566597).

The spelling of 23042565 in words is "twenty-three million, forty-two thousand, five hundred sixty-five".