1251115753 has 2 divisors, whose sum is σ = 1251115754. Its totient is φ = 1251115752.

The previous prime is 1251115741. The next prime is 1251115777. The reversal of 1251115753 is 3575111521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 709529769 + 541585984 = 26637^2 + 23272^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251115753 - 2⁹ = 1251115241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1251115793) 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, 625557876 + 625557877.

It is an arithmetic number, because the mean of its divisors is an integer number (625557877).

Almost surely, 2^1251115753 is an apocalyptic number.

It is an amenable number.

1251115753 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251115753 is an equidigital number, since it uses as much as digits as its factorization.

1251115753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5250, while the sum is 31.

The square root of 1251115753 is about 35371.1146700242. The cubic root of 1251115753 is about 1077.5377586300.

The spelling of 1251115753 in words is "one billion, two hundred fifty-one million, one hundred fifteen thousand, seven hundred fifty-three".