12409945 has 8 divisors (see below), whose sum is σ = 15675840. Its totient is φ = 9405360.

The previous prime is 12409939. The next prime is 12409979. The reversal of 12409945 is 54990421.

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

It is not a de Polignac number, because 12409945 - 2⁵ = 12409913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12409945.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65221 + ... + 65410.

It is an arithmetic number, because the mean of its divisors is an integer number (1959480).

Almost surely, 2^12409945 is an apocalyptic number.

It is an amenable number.

12409945 is a deficient number, since it is larger than the sum of its proper divisors (3265895).

12409945 is a wasteful number, since it uses less digits than its factorization.

12409945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130655.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 12409945 is about 3522.7751844249. The cubic root of 12409945 is about 231.5207668427.

The spelling of 12409945 in words is "twelve million, four hundred nine thousand, nine hundred forty-five".