12691016 has 16 divisors (see below), whose sum is σ = 25626300. Its totient is φ = 5857344.

The previous prime is 12691001. The next prime is 12691033. The reversal of 12691016 is 61019621.

It can be written as a sum of positive squares in 2 ways, for example, as 10588516 + 2102500 = 3254^2 + 1450^2 .

It is a super-2 number, since 2×12691016² = 322123774224512, which contains 22 as substring.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60911 + ... + 61118.

Almost surely, 2^12691016 is an apocalyptic number.

It is an amenable number.

12691016 is an abundant number, since it is smaller than the sum of its proper divisors (12935284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12691016 is a wasteful number, since it uses less digits than its factorization.

12691016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122048 (or 122044 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 12691016 is about 3562.4452276491. The cubic root of 12691016 is about 233.2556276397.

The spelling of 12691016 in words is "twelve million, six hundred ninety-one thousand, sixteen".