23455421 has 4 divisors (see below), whose sum is σ = 25587744. Its totient is φ = 21323100.

The previous prime is 23455417. The next prime is 23455429. The reversal of 23455421 is 12455432.

It is a happy number.

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 23455421 - 2² = 23455417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23455429) 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, 1066145 + ... + 1066166.

It is an arithmetic number, because the mean of its divisors is an integer number (6396936).

Almost surely, 2^23455421 is an apocalyptic number.

It is an amenable number.

23455421 is a deficient number, since it is larger than the sum of its proper divisors (2132323).

23455421 is a wasteful number, since it uses less digits than its factorization.

23455421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132322.

The product of its digits is 4800, while the sum is 26.

The square root of 23455421 is about 4843.0797020078. The cubic root of 23455421 is about 286.2514822295.

It can be divided in two parts, 234 and 55421, that added together give a palindrome (55655).

The spelling of 23455421 in words is "twenty-three million, four hundred fifty-five thousand, four hundred twenty-one".