12797561 has 4 divisors (see below), whose sum is σ = 14625792. Its totient is φ = 10969332.

The previous prime is 12797527. The next prime is 12797563. The reversal of 12797561 is 16579721.

12797561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12797561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12797563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914105 + ... + 914118.

It is an arithmetic number, because the mean of its divisors is an integer number (3656448).

Almost surely, 2^12797561 is an apocalyptic number.

It is an amenable number.

12797561 is a deficient number, since it is larger than the sum of its proper divisors (1828231).

12797561 is an equidigital number, since it uses as much as digits as its factorization.

12797561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828230.

The product of its digits is 26460, while the sum is 38.

The square root of 12797561 is about 3577.3678871483. The cubic root of 12797561 is about 233.9065604481.

The spelling of 12797561 in words is "twelve million, seven hundred ninety-seven thousand, five hundred sixty-one".