12812251 has 6 divisors (see below), whose sum is σ = 13522452. Its totient is φ = 12137580.

The previous prime is 12812243. The next prime is 12812291. The reversal of 12812251 is 15221821.

It is not a de Polignac number, because 12812251 - 2³ = 12812243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12812291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17385 + ... + 18106.

It is an arithmetic number, because the mean of its divisors is an integer number (2253742).

Almost surely, 2^12812251 is an apocalyptic number.

12812251 is a deficient number, since it is larger than the sum of its proper divisors (710201).

12812251 is an equidigital number, since it uses as much as digits as its factorization.

12812251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35529 (or 35510 counting only the distinct ones).

The product of its digits is 320, while the sum is 22.

The square root of 12812251 is about 3579.4204838214. The cubic root of 12812251 is about 233.9960247212.

The spelling of 12812251 in words is "twelve million, eight hundred twelve thousand, two hundred fifty-one".