1251315371 has 2 divisors, whose sum is σ = 1251315372. Its totient is φ = 1251315370.

The previous prime is 1251315349. The next prime is 1251315463. The reversal of 1251315371 is 1735131521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1251315371 - 2¹⁰ = 1251314347 is a prime.

It is not a weakly prime, because it can be changed into another prime (1251315301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625657685 + 625657686.

It is an arithmetic number, because the mean of its divisors is an integer number (625657686).

Almost surely, 2^1251315371 is an apocalyptic number.

1251315371 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251315371 is an equidigital number, since it uses as much as digits as its factorization.

1251315371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 29.

The square root of 1251315371 is about 35373.9363232310. The cubic root of 1251315371 is about 1077.5950633447.

Adding to 1251315371 its reverse (1735131521), we get a palindrome (2986446892).

The spelling of 1251315371 in words is "one billion, two hundred fifty-one million, three hundred fifteen thousand, three hundred seventy-one".