12812249 has 4 divisors (see below), whose sum is σ = 13158564. Its totient is φ = 12465936.

The previous prime is 12812243. The next prime is 12812291. The reversal of 12812249 is 94221821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94221821 = 229 ⋅411449.

It can be written as a sum of positive squares in 2 ways, for example, as 10465225 + 2347024 = 3235^2 + 1532^2 .

It is a cyclic number.

It is not a de Polignac number, because 12812249 - 2⁸ = 12811993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12812243) 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, 173102 + ... + 173175.

It is an arithmetic number, because the mean of its divisors is an integer number (3289641).

Almost surely, 2^12812249 is an apocalyptic number.

It is an amenable number.

12812249 is a deficient number, since it is larger than the sum of its proper divisors (346315).

12812249 is an equidigital number, since it uses as much as digits as its factorization.

12812249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346314.

The product of its digits is 2304, while the sum is 29.

The square root of 12812249 is about 3579.4202044465. The cubic root of 12812249 is about 233.9960125456.

The spelling of 12812249 in words is "twelve million, eight hundred twelve thousand, two hundred forty-nine".