12878522 has 8 divisors (see below), whose sum is σ = 19384596. Its totient is φ = 6416992.

The previous prime is 12878521. The next prime is 12878531. The reversal of 12878522 is 22587821.

It can be written as a sum of positive squares in 2 ways, for example, as 12033961 + 844561 = 3469^2 + 919^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12878521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10403 + ... + 11574.

Almost surely, 2^12878522 is an apocalyptic number.

12878522 is a deficient number, since it is larger than the sum of its proper divisors (6506074).

12878522 is a wasteful number, since it uses less digits than its factorization.

12878522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22272.

The product of its digits is 17920, while the sum is 35.

The square root of 12878522 is about 3588.6657687781. The cubic root of 12878522 is about 234.3987770130.

The spelling of 12878522 in words is "twelve million, eight hundred seventy-eight thousand, five hundred twenty-two".