23581421 has 8 divisors (see below), whose sum is σ = 24652800. Its totient is φ = 22529520.

The previous prime is 23581391. The next prime is 23581427. The reversal of 23581421 is 12418532.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23581421 - 2¹⁰ = 23580397 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 (23581427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2366 + ... + 7263.

It is an arithmetic number, because the mean of its divisors is an integer number (3081600).

Almost surely, 2^23581421 is an apocalyptic number.

It is an amenable number.

23581421 is a deficient number, since it is larger than the sum of its proper divisors (1071379).

23581421 is an equidigital number, since it uses as much as digits as its factorization.

23581421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9739.

The product of its digits is 1920, while the sum is 26.

The square root of 23581421 is about 4856.0705307893. The cubic root of 23581421 is about 286.7631378635.

Adding to 23581421 its reverse (12418532), we get a palindrome (35999953).

The spelling of 23581421 in words is "twenty-three million, five hundred eighty-one thousand, four hundred twenty-one".