23875421 has 4 divisors (see below), whose sum is σ = 23887644. Its totient is φ = 23863200.

The previous prime is 23875417. The next prime is 23875427. The reversal of 23875421 is 12457832.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5812921 + 18062500 = 2411^2 + 4250^2 .

It is a cyclic number.

It is not a de Polignac number, because 23875421 - 2² = 23875417 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 (23875427) 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, 2450 + ... + 7331.

It is an arithmetic number, because the mean of its divisors is an integer number (5971911).

Almost surely, 2^23875421 is an apocalyptic number.

It is an amenable number.

23875421 is a deficient number, since it is larger than the sum of its proper divisors (12223).

23875421 is an equidigital number, since it uses as much as digits as its factorization.

23875421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12222.

The product of its digits is 13440, while the sum is 32.

The square root of 23875421 is about 4886.2481517009. The cubic root of 23875421 is about 287.9499535273.

The spelling of 23875421 in words is "twenty-three million, eight hundred seventy-five thousand, four hundred twenty-one".