1251542144291 has 2 divisors, whose sum is σ = 1251542144292. Its totient is φ = 1251542144290.

The previous prime is 1251542144269. The next prime is 1251542144317. The reversal of 1251542144291 is 1924412451521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1251542144291 is a prime.

It is not a weakly prime, because it can be changed into another prime (1251542144201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625771072145 + 625771072146.

It is an arithmetic number, because the mean of its divisors is an integer number (625771072146).

Almost surely, 2^{1251542144291} is an apocalyptic number.

1251542144291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251542144291 is an equidigital number, since it uses as much as digits as its factorization.

1251542144291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 41.

The spelling of 1251542144291 in words is "one trillion, two hundred fifty-one billion, five hundred forty-two million, one hundred forty-four thousand, two hundred ninety-one".