12975778 has 16 divisors (see below), whose sum is σ = 19979136. Its totient is φ = 6318000.

The previous prime is 12975769. The next prime is 12975779. The reversal of 12975778 is 87757921.

It is not an unprimeable number, because it can be changed into a prime (12975779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16903 + ... + 17653.

It is an arithmetic number, because the mean of its divisors is an integer number (1248696).

Almost surely, 2^12975778 is an apocalyptic number.

12975778 is a deficient number, since it is larger than the sum of its proper divisors (7003358).

12975778 is a wasteful number, since it uses less digits than its factorization.

12975778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969.

The product of its digits is 246960, while the sum is 46.

The square root of 12975778 is about 3602.1907223244. The cubic root of 12975778 is about 234.9873420072.

The spelling of 12975778 in words is "twelve million, nine hundred seventy-five thousand, seven hundred seventy-eight".