12692749 has 4 divisors (see below), whose sum is σ = 13130460. Its totient is φ = 12255040.

The previous prime is 12692731. The next prime is 12692753. The reversal of 12692749 is 94729621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94729621 = 7 ⋅13532803.

It can be written as a sum of positive squares in 2 ways, for example, as 3175524 + 9517225 = 1782^2 + 3085^2 .

It is a cyclic number.

It is not a de Polignac number, because 12692749 - 2⁵ = 12692717 is a prime.

It is a super-2 number, since 2×12692749² = 322211754354002, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12692789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218812 + ... + 218869.

It is an arithmetic number, because the mean of its divisors is an integer number (3282615).

Almost surely, 2^12692749 is an apocalyptic number.

It is an amenable number.

12692749 is a deficient number, since it is larger than the sum of its proper divisors (437711).

12692749 is an equidigital number, since it uses as much as digits as its factorization.

12692749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437710.

The product of its digits is 54432, while the sum is 40.

The square root of 12692749 is about 3562.6884511560. The cubic root of 12692749 is about 233.2662444310.

The spelling of 12692749 in words is "twelve million, six hundred ninety-two thousand, seven hundred forty-nine".