12409956 has 48 divisors (see below), whose sum is σ = 34652800. Its totient is φ = 3818016.

The previous prime is 12409939. The next prime is 12409979. The reversal of 12409956 is 65990421.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 12409956.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3016 + ... + 5823.

Almost surely, 2^12409956 is an apocalyptic number.

It is an amenable number.

12409956 is an abundant number, since it is smaller than the sum of its proper divisors (22242844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12409956 is a wasteful number, since it uses less digits than its factorization.

12409956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8865 (or 8857 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 12409956 is about 3522.7767456937. The cubic root of 12409956 is about 231.5208352483.

The spelling of 12409956 in words is "twelve million, four hundred nine thousand, nine hundred fifty-six".