23426521 has 4 divisors (see below), whose sum is σ = 23756544. Its totient is φ = 23096500.

The previous prime is 23426497. The next prime is 23426531. The reversal of 23426521 is 12562432.

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 23426521 - 2¹⁵ = 23393753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23426531) 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, 164905 + ... + 165046.

It is an arithmetic number, because the mean of its divisors is an integer number (5939136).

Almost surely, 2^23426521 is an apocalyptic number.

It is an amenable number.

23426521 is a deficient number, since it is larger than the sum of its proper divisors (330023).

23426521 is an equidigital number, since it uses as much as digits as its factorization.

23426521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330022.

The product of its digits is 2880, while the sum is 25.

The square root of 23426521 is about 4840.0951436929. The cubic root of 23426521 is about 286.1338680851.

Adding to 23426521 its reverse (12562432), we get a palindrome (35988953).

The spelling of 23426521 in words is "twenty-three million, four hundred twenty-six thousand, five hundred twenty-one".