1257106866725 has 6 divisors (see below), whose sum is σ = 1558812514770. Its totient is φ = 1005685493360.

The previous prime is 1257106866703. The next prime is 1257106866779. The reversal of 1257106866725 is 5276686017521.

It can be written as a sum of positive squares in 3 ways, for example, as 12791157604 + 1244315709121 = 113098^2 + 1115489^2 .

It is not a de Polignac number, because 1257106866725 - 2⁶ = 1257106866661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25142137310 + ... + 25142137359.

It is an arithmetic number, because the mean of its divisors is an integer number (259802085795).

Almost surely, 2^{1257106866725} is an apocalyptic number.

It is an amenable number.

1257106866725 is a deficient number, since it is larger than the sum of its proper divisors (301705648045).

1257106866725 is an equidigital number, since it uses as much as digits as its factorization.

1257106866725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50284274679 (or 50284274674 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 1257106866725 in words is "one trillion, two hundred fifty-seven billion, one hundred six million, eight hundred sixty-six thousand, seven hundred twenty-five".