23747121 has 8 divisors (see below), whose sum is σ = 35180960. Its totient is φ = 15831396.

The previous prime is 23747111. The next prime is 23747123. The reversal of 23747121 is 12174732.

It is a happy number.

It is not a de Polignac number, because 23747121 - 2⁵ = 23747089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 879523 = 23747121 / (2 + 3 + 7 + 4 + 7 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23747123) 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, 439735 + ... + 439788.

It is an arithmetic number, because the mean of its divisors is an integer number (4397620).

Almost surely, 2^23747121 is an apocalyptic number.

It is an amenable number.

23747121 is a deficient number, since it is larger than the sum of its proper divisors (11433839).

23747121 is an equidigital number, since it uses as much as digits as its factorization.

23747121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879532 (or 879526 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 23747121 is about 4873.1017842848. The cubic root of 23747121 is about 287.4332386886.

The spelling of 23747121 in words is "twenty-three million, seven hundred forty-seven thousand, one hundred twenty-one".