1252777166873 has 2 divisors, whose sum is σ = 1252777166874. Its totient is φ = 1252777166872.

The previous prime is 1252777166843. The next prime is 1252777166881. The reversal of 1252777166873 is 3786617772521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 935297883664 + 317479283209 = 967108^2 + 563453^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252777166873 - 2³⁴ = 1235597297689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1252777166813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626388583436 + 626388583437.

It is an arithmetic number, because the mean of its divisors is an integer number (626388583437).

Almost surely, 2^{1252777166873} is an apocalyptic number.

It is an amenable number.

1252777166873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252777166873 is an equidigital number, since it uses as much as digits as its factorization.

1252777166873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41489280, while the sum is 62.

The spelling of 1252777166873 in words is "one trillion, two hundred fifty-two billion, seven hundred seventy-seven million, one hundred sixty-six thousand, eight hundred seventy-three".