12157284 has 24 divisors (see below), whose sum is σ = 28792288. Its totient is φ = 3991680.

The previous prime is 12157273. The next prime is 12157303. The reversal of 12157284 is 48275121.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

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, 6757 + ... + 8364.

Almost surely, 2^12157284 is an apocalyptic number.

It is an amenable number.

12157284 is an abundant number, since it is smaller than the sum of its proper divisors (16635004).

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

12157284 is a wasteful number, since it uses less digits than its factorization.

12157284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15195 (or 15193 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 12157284 is about 3486.7296998764. The cubic root of 12157284 is about 229.9387612640.

The spelling of 12157284 in words is "twelve million, one hundred fifty-seven thousand, two hundred eighty-four".