12991276 has 6 divisors (see below), whose sum is σ = 22734740. Its totient is φ = 6495636.

The previous prime is 12991267. The next prime is 12991291. The reversal of 12991276 is 67219921.

12991276 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1623906 + ... + 1623913.

Almost surely, 2^12991276 is an apocalyptic number.

It is an amenable number.

12991276 is a deficient number, since it is larger than the sum of its proper divisors (9743464).

12991276 is a wasteful number, since it uses less digits than its factorization.

12991276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247823 (or 3247821 counting only the distinct ones).

The product of its digits is 13608, while the sum is 37.

The square root of 12991276 is about 3604.3412713005. The cubic root of 12991276 is about 235.0808594538.

The spelling of 12991276 in words is "twelve million, nine hundred ninety-one thousand, two hundred seventy-six".