125257672123 has 2 divisors, whose sum is σ = 125257672124. Its totient is φ = 125257672122.

The previous prime is 125257672109. The next prime is 125257672193. The reversal of 125257672123 is 321276752521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125257672123 - 2⁹ = 125257671611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125257672123.

It is not a weakly prime, because it can be changed into another prime (125257672193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62628836061 + 62628836062.

It is an arithmetic number, because the mean of its divisors is an integer number (62628836062).

Almost surely, 2^125257672123 is an apocalyptic number.

125257672123 is a deficient number, since it is larger than the sum of its proper divisors (1).

125257672123 is an equidigital number, since it uses as much as digits as its factorization.

125257672123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352800, while the sum is 43.

The spelling of 125257672123 in words is "one hundred twenty-five billion, two hundred fifty-seven million, six hundred seventy-two thousand, one hundred twenty-three".