12978202 has 4 divisors (see below), whose sum is σ = 19467306. Its totient is φ = 6489100.

The previous prime is 12978169. The next prime is 12978211. The reversal of 12978202 is 20287921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11634921 + 1343281 = 3411^2 + 1159^2 .

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 polite number, since it can be written as a sum of consecutive naturals, namely, 3244549 + ... + 3244552.

Almost surely, 2^12978202 is an apocalyptic number.

12978202 is a deficient number, since it is larger than the sum of its proper divisors (6489104).

12978202 is an equidigital number, since it uses as much as digits as its factorization.

12978202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6489103.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 12978202 is about 3602.5271685304. The cubic root of 12978202 is about 235.0019737272.

The spelling of 12978202 in words is "twelve million, nine hundred seventy-eight thousand, two hundred two".