12691268 has 6 divisors (see below), whose sum is σ = 22209726. Its totient is φ = 6345632.

The previous prime is 12691247. The next prime is 12691291. The reversal of 12691268 is 86219621.

It can be written as a sum of positive squares in only one way, i.e., 10640644 + 2050624 = 3262^2 + 1432^2 .

It is a super-2 number, since 2×12691268² = 322136566895648, which contains 22 as substring.

It is a zygodrome in base 5.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1586405 + ... + 1586412.

It is an arithmetic number, because the mean of its divisors is an integer number (3701621).

Almost surely, 2^12691268 is an apocalyptic number.

It is an amenable number.

12691268 is a deficient number, since it is larger than the sum of its proper divisors (9518458).

12691268 is a wasteful number, since it uses less digits than its factorization.

12691268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172821 (or 3172819 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 12691268 is about 3562.4805964384. The cubic root of 12691268 is about 233.2571715148.

The spelling of 12691268 in words is "twelve million, six hundred ninety-one thousand, two hundred sixty-eight".