23542565 has 4 divisors (see below), whose sum is σ = 28251084. Its totient is φ = 18834048.

The previous prime is 23542559. The next prime is 23542591. The reversal of 23542565 is 56524532.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3094081 + 20448484 = 1759^2 + 4522^2 .

It is a cyclic number.

It is not a de Polignac number, because 23542565 - 2⁴ = 23542549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2354252 + ... + 2354261.

It is an arithmetic number, because the mean of its divisors is an integer number (7062771).

Almost surely, 2^23542565 is an apocalyptic number.

It is an amenable number.

23542565 is a deficient number, since it is larger than the sum of its proper divisors (4708519).

23542565 is an equidigital number, since it uses as much as digits as its factorization.

23542565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4708518.

The product of its digits is 36000, while the sum is 32.

The square root of 23542565 is about 4852.0681157626. The cubic root of 23542565 is about 286.6055477837.

The spelling of 23542565 in words is "twenty-three million, five hundred forty-two thousand, five hundred sixty-five".