1251144252157 has 2 divisors, whose sum is σ = 1251144252158. Its totient is φ = 1251144252156.

The previous prime is 1251144252097. The next prime is 1251144252187. The reversal of 1251144252157 is 7512524411521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1045258819641 + 205885432516 = 1022379^2 + 453746^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251144252157 - 2¹⁵ = 1251144219389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251144252187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625572126078 + 625572126079.

It is an arithmetic number, because the mean of its divisors is an integer number (625572126079).

Almost surely, 2^{1251144252157} is an apocalyptic number.

It is an amenable number.

1251144252157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251144252157 is an equidigital number, since it uses as much as digits as its factorization.

1251144252157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112000, while the sum is 40.

Adding to 1251144252157 its reverse (7512524411521), we get a palindrome (8763668663678).

The spelling of 1251144252157 in words is "one trillion, two hundred fifty-one billion, one hundred forty-four million, two hundred fifty-two thousand, one hundred fifty-seven".