12874978 has 4 divisors (see below), whose sum is σ = 19312470. Its totient is φ = 6437488.

The previous prime is 12874973. The next prime is 12874987. The reversal of 12874978 is 87947821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87947821 = 13 ⋅6765217.

It can be written as a sum of positive squares in only one way, i.e., 8602489 + 4272489 = 2933^2 + 2067^2 .

It is a super-3 number, since 3×12874978³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12874973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3218743 + ... + 3218746.

Almost surely, 2^12874978 is an apocalyptic number.

12874978 is a deficient number, since it is larger than the sum of its proper divisors (6437492).

12874978 is an equidigital number, since it uses as much as digits as its factorization.

12874978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6437491.

The product of its digits is 225792, while the sum is 46.

The square root of 12874978 is about 3588.1719579753. The cubic root of 12874978 is about 234.3772738861.

The spelling of 12874978 in words is "twelve million, eight hundred seventy-four thousand, nine hundred seventy-eight".