12404891 has 8 divisors (see below), whose sum is σ = 13110480. Its totient is φ = 11704608.

The previous prime is 12404863. The next prime is 12404897. The reversal of 12404891 is 19840421.

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

It is not a de Polignac number, because 12404891 - 2⁶ = 12404827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12404897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4085 + ... + 6441.

It is an arithmetic number, because the mean of its divisors is an integer number (1638810).

Almost surely, 2^12404891 is an apocalyptic number.

12404891 is a deficient number, since it is larger than the sum of its proper divisors (705589).

12404891 is a wasteful number, since it uses less digits than its factorization.

12404891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 12404891 is about 3522.0577791967. The cubic root of 12404891 is about 231.4893333208.

The spelling of 12404891 in words is "twelve million, four hundred four thousand, eight hundred ninety-one".