1251415133 has 2 divisors, whose sum is σ = 1251415134. Its totient is φ = 1251415132.

The previous prime is 1251415103. The next prime is 1251415141. The reversal of 1251415133 is 3315141521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 950982244 + 300432889 = 30838^2 + 17333^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251415133 - 2¹⁸ = 1251152989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251415103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625707566 + 625707567.

It is an arithmetic number, because the mean of its divisors is an integer number (625707567).

Almost surely, 2^1251415133 is an apocalyptic number.

It is an amenable number.

1251415133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251415133 is an equidigital number, since it uses as much as digits as its factorization.

1251415133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 1251415133 is about 35375.3464011308. The cubic root of 1251415133 is about 1077.6236999257.

Adding to 1251415133 its reverse (3315141521), we get a palindrome (4566556654).

The spelling of 1251415133 in words is "one billion, two hundred fifty-one million, four hundred fifteen thousand, one hundred thirty-three".