12779251 has 4 divisors (see below), whose sum is σ = 12802752. Its totient is φ = 12755752.

The previous prime is 12779233. The next prime is 12779287. The reversal of 12779251 is 15297721.

12779251 is digitally balanced in base 3, 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 an emirpimes, since its reverse is a distinct semiprime: 15297721 = 2689 ⋅5689.

It is a cyclic number.

It is not a de Polignac number, because 12779251 - 2¹¹ = 12777203 is a prime.

It is a super-2 number, since 2×12779251² = 326618512242002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12779231) 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, 10915 + ... + 12028.

It is an arithmetic number, because the mean of its divisors is an integer number (3200688).

Almost surely, 2^12779251 is an apocalyptic number.

12779251 is a deficient number, since it is larger than the sum of its proper divisors (23501).

12779251 is an equidigital number, since it uses as much as digits as its factorization.

12779251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23500.

The product of its digits is 8820, while the sum is 34.

The square root of 12779251 is about 3574.8078270027. The cubic root of 12779251 is about 233.7949539400.

The spelling of 12779251 in words is "twelve million, seven hundred seventy-nine thousand, two hundred fifty-one".