1251204313 has 2 divisors, whose sum is σ = 1251204314. Its totient is φ = 1251204312.

The previous prime is 1251204289. The next prime is 1251204329. The reversal of 1251204313 is 3134021521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1108090944 + 143113369 = 33288^2 + 11963^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1251204313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1251204373) 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 as a sum of consecutive naturals, namely, 625602156 + 625602157.

It is an arithmetic number, because the mean of its divisors is an integer number (625602157).

Almost surely, 2^1251204313 is an apocalyptic number.

It is an amenable number.

1251204313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251204313 is an equidigital number, since it uses as much as digits as its factorization.

1251204313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1251204313 is about 35372.3665168165. The cubic root of 1251204313 is about 1077.5631824679.

Adding to 1251204313 its reverse (3134021521), we get a palindrome (4385225834).

The spelling of 1251204313 in words is "one billion, two hundred fifty-one million, two hundred four thousand, three hundred thirteen".