12955578 has 32 divisors (see below), whose sum is σ = 27216000. Its totient is φ = 4103616.

The previous prime is 12955543. The next prime is 12955609. The reversal of 12955578 is 87555921.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36948 + ... + 37296.

It is an arithmetic number, because the mean of its divisors is an integer number (850500).

Almost surely, 2^12955578 is an apocalyptic number.

12955578 is an abundant number, since it is smaller than the sum of its proper divisors (14260422).

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

12955578 is a wasteful number, since it uses less digits than its factorization.

12955578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646.

The product of its digits is 126000, while the sum is 42.

The square root of 12955578 is about 3599.3857809354. The cubic root of 12955578 is about 234.8653400843.

The spelling of 12955578 in words is "twelve million, nine hundred fifty-five thousand, five hundred seventy-eight".