12136978 has 8 divisors (see below), whose sum is σ = 20806272. Its totient is φ = 5201556.

The previous prime is 12136937. The next prime is 12137003. The reversal of 12136978 is 87963121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433450 + ... + 433477.

It is an arithmetic number, because the mean of its divisors is an integer number (2600784).

Almost surely, 2^12136978 is an apocalyptic number.

12136978 is a deficient number, since it is larger than the sum of its proper divisors (8669294).

12136978 is an equidigital number, since it uses as much as digits as its factorization.

12136978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866936.

The product of its digits is 18144, while the sum is 37.

The square root of 12136978 is about 3483.8165852984. The cubic root of 12136978 is about 229.8106696475.

The spelling of 12136978 in words is "twelve million, one hundred thirty-six thousand, nine hundred seventy-eight".