12797405 has 4 divisors (see below), whose sum is σ = 15356892. Its totient is φ = 10237920.

The previous prime is 12797383. The next prime is 12797417. The reversal of 12797405 is 50479721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50479721 = 43 ⋅1173947.

It can be written as a sum of positive squares in 2 ways, for example, as 5769604 + 7027801 = 2402^2 + 2651^2 .

It is not a de Polignac number, because 12797405 - 2²⁰ = 11748829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1279736 + ... + 1279745.

It is an arithmetic number, because the mean of its divisors is an integer number (3839223).

Almost surely, 2^12797405 is an apocalyptic number.

It is an amenable number.

12797405 is a deficient number, since it is larger than the sum of its proper divisors (2559487).

12797405 is an equidigital number, since it uses as much as digits as its factorization.

12797405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559486.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 12797405 is about 3577.3460833417. The cubic root of 12797405 is about 233.9056100177.

The spelling of 12797405 in words is "twelve million, seven hundred ninety-seven thousand, four hundred five".