12409885 has 4 divisors (see below), whose sum is σ = 14891868. Its totient is φ = 9927904.

The previous prime is 12409879. The next prime is 12409909. The reversal of 12409885 is 58890421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6446521 + 5963364 = 2539^2 + 2442^2 .

It is a cyclic number.

It is not a de Polignac number, because 12409885 - 2⁹ = 12409373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1240984 + ... + 1240993.

It is an arithmetic number, because the mean of its divisors is an integer number (3722967).

Almost surely, 2^12409885 is an apocalyptic number.

It is an amenable number.

12409885 is a deficient number, since it is larger than the sum of its proper divisors (2481983).

12409885 is an equidigital number, since it uses as much as digits as its factorization.

12409885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481982.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 12409885 is about 3522.7666684014. The cubic root of 12409885 is about 231.5203937208.

The spelling of 12409885 in words is "twelve million, four hundred nine thousand, eight hundred eighty-five".