12797287 has 4 divisors (see below), whose sum is σ = 12822280. Its totient is φ = 12772296.

The previous prime is 12797261. The next prime is 12797297. The reversal of 12797287 is 78279721.

It is a happy number.

12797287 is digitally balanced in base 2 and base 3, because in such bases 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 an emirpimes, since its reverse is a distinct semiprime: 78279721 = 13 ⋅6021517.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12797287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12797237) 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, 11712 + ... + 12757.

It is an arithmetic number, because the mean of its divisors is an integer number (3205570).

Almost surely, 2^12797287 is an apocalyptic number.

12797287 is a deficient number, since it is larger than the sum of its proper divisors (24993).

12797287 is an equidigital number, since it uses as much as digits as its factorization.

12797287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24992.

The product of its digits is 98784, while the sum is 43.

The square root of 12797287 is about 3577.3295906304. The cubic root of 12797287 is about 233.9048910973.

The spelling of 12797287 in words is "twelve million, seven hundred ninety-seven thousand, two hundred eighty-seven".