12156878 has 4 divisors (see below), whose sum is σ = 18235320. Its totient is φ = 6078438.

The previous prime is 12156847. The next prime is 12156899. The reversal of 12156878 is 87865121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87865121 = 37 ⋅2374733.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3039218 + ... + 3039221.

It is an arithmetic number, because the mean of its divisors is an integer number (4558830).

Almost surely, 2^12156878 is an apocalyptic number.

12156878 is a deficient number, since it is larger than the sum of its proper divisors (6078442).

12156878 is an equidigital number, since it uses as much as digits as its factorization.

12156878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6078441.

The product of its digits is 26880, while the sum is 38.

The square root of 12156878 is about 3486.6714786455. The cubic root of 12156878 is about 229.9362015866.

The spelling of 12156878 in words is "twelve million, one hundred fifty-six thousand, eight hundred seventy-eight".