12456909 has 12 divisors (see below), whose sum is σ = 18660096. Its totient is φ = 8304444.

The previous prime is 12456887. The next prime is 12456911. The reversal of 12456909 is 90965421.

It is not a de Polignac number, because 12456909 - 2⁵ = 12456877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12456929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25389 + ... + 25874.

It is an arithmetic number, because the mean of its divisors is an integer number (1555008).

Almost surely, 2^12456909 is an apocalyptic number.

It is an amenable number.

12456909 is a deficient number, since it is larger than the sum of its proper divisors (6203187).

12456909 is an frugal number, since it uses more digits than its factorization.

12456909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51278 (or 51266 counting only the distinct ones).

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

The square root of 12456909 is about 3529.4346572787. The cubic root of 12456909 is about 231.8124537119.

The spelling of 12456909 in words is "twelve million, four hundred fifty-six thousand, nine hundred nine".