12720874 has 4 divisors (see below), whose sum is σ = 19081314. Its totient is φ = 6360436.

The previous prime is 12720847. The next prime is 12720887. The reversal of 12720874 is 47802721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47802721 = 277 ⋅172573.

It can be written as a sum of positive squares in only one way, i.e., 9455625 + 3265249 = 3075^2 + 1807^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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, 3180217 + ... + 3180220.

Almost surely, 2^12720874 is an apocalyptic number.

12720874 is a deficient number, since it is larger than the sum of its proper divisors (6360440).

12720874 is an equidigital number, since it uses as much as digits as its factorization.

12720874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6360439.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 12720874 is about 3566.6334266364. The cubic root of 12720874 is about 233.4384102700.

The spelling of 12720874 in words is "twelve million, seven hundred twenty thousand, eight hundred seventy-four".