12257278 has 32 divisors (see below), whose sum is σ = 20901888. Its totient is φ = 5342400.

The previous prime is 12257263. The next prime is 12257281. The reversal of 12257278 is 87275221.

It is a congruent 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, 96451 + ... + 96577.

It is an arithmetic number, because the mean of its divisors is an integer number (653184).

Almost surely, 2^12257278 is an apocalyptic number.

12257278 is a deficient number, since it is larger than the sum of its proper divisors (8644610).

12257278 is a wasteful number, since it uses less digits than its factorization.

12257278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288.

The product of its digits is 15680, while the sum is 34.

The square root of 12257278 is about 3501.0395599022. The cubic root of 12257278 is about 230.5674582931.

The spelling of 12257278 in words is "twelve million, two hundred fifty-seven thousand, two hundred seventy-eight".