12157118 has 4 divisors (see below), whose sum is σ = 18235680. Its totient is φ = 6078558.

The previous prime is 12157069. The next prime is 12157129. The reversal of 12157118 is 81175121.

12157118 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3039278 + ... + 3039281.

It is an arithmetic number, because the mean of its divisors is an integer number (4558920).

Almost surely, 2^12157118 is an apocalyptic number.

12157118 is a deficient number, since it is larger than the sum of its proper divisors (6078562).

12157118 is an equidigital number, since it uses as much as digits as its factorization.

12157118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6078561.

The product of its digits is 560, while the sum is 26.

The square root of 12157118 is about 3486.7058952541. The cubic root of 12157118 is about 229.9377147033.

The spelling of 12157118 in words is "twelve million, one hundred fifty-seven thousand, one hundred eighteen".