1273460145557 has 2 divisors, whose sum is σ = 1273460145558. Its totient is φ = 1273460145556.

The previous prime is 1273460145541. The next prime is 1273460145563. The reversal of 1273460145557 is 7555410643721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 830269038481 + 443191107076 = 911191^2 + 665726^2 .

It is a cyclic number.

It is not a de Polignac number, because 1273460145557 - 2⁴ = 1273460145541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1273460148557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636730072778 + 636730072779.

It is an arithmetic number, because the mean of its divisors is an integer number (636730072779).

Almost surely, 2^{1273460145557} is an apocalyptic number.

It is an amenable number.

1273460145557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1273460145557 is an equidigital number, since it uses as much as digits as its factorization.

1273460145557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528000, while the sum is 50.

The spelling of 1273460145557 in words is "one trillion, two hundred seventy-three billion, four hundred sixty million, one hundred forty-five thousand, five hundred fifty-seven".