1251412369 has 2 divisors, whose sum is σ = 1251412370. Its totient is φ = 1251412368.

The previous prime is 1251412339. The next prime is 1251412391. The reversal of 1251412369 is 9632141521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1111889025 + 139523344 = 33345^2 + 11812^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251412369 - 2¹³ = 1251404177 is a prime.

It is a super-2 number, since 2×1251412369² = 3132065834572384322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1251412319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625706184 + 625706185.

It is an arithmetic number, because the mean of its divisors is an integer number (625706185).

Almost surely, 2^1251412369 is an apocalyptic number.

It is an amenable number.

1251412369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251412369 is an equidigital number, since it uses as much as digits as its factorization.

1251412369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 1251412369 is about 35375.3073343540. The cubic root of 1251412369 is about 1077.6229065428.

The spelling of 1251412369 in words is "one billion, two hundred fifty-one million, four hundred twelve thousand, three hundred sixty-nine".