1251946161157 has 2 divisors, whose sum is σ = 1251946161158. Its totient is φ = 1251946161156.

The previous prime is 1251946161083. The next prime is 1251946161241. The reversal of 1251946161157 is 7511616491521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1121461938081 + 130484223076 = 1058991^2 + 361226^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251946161157 - 2²⁷ = 1251811943429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1251946161157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251946101157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625973080578 + 625973080579.

It is an arithmetic number, because the mean of its divisors is an integer number (625973080579).

Almost surely, 2^{1251946161157} is an apocalyptic number.

It is an amenable number.

1251946161157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251946161157 is an equidigital number, since it uses as much as digits as its factorization.

1251946161157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 49.

The spelling of 1251946161157 in words is "one trillion, two hundred fifty-one billion, nine hundred forty-six million, one hundred sixty-one thousand, one hundred fifty-seven".