12866404 has 6 divisors (see below), whose sum is σ = 22516214. Its totient is φ = 6433200.

The previous prime is 12866393. The next prime is 12866423. The reversal of 12866404 is 40466821.

It can be written as a sum of positive squares in only one way, i.e., 9796900 + 3069504 = 3130^2 + 1752^2 .

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608297 + ... + 1608304.

Almost surely, 2^12866404 is an apocalyptic number.

It is an amenable number.

12866404 is a deficient number, since it is larger than the sum of its proper divisors (9649810).

12866404 is a wasteful number, since it uses less digits than its factorization.

12866404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216605 (or 3216603 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 12866404 is about 3586.9770002050. The cubic root of 12866404 is about 234.3252350401.

The spelling of 12866404 in words is "twelve million, eight hundred sixty-six thousand, four hundred four".