125757557 has 4 divisors (see below), whose sum is σ = 125961996. Its totient is φ = 125553120.

The previous prime is 125757547. The next prime is 125757589. The reversal of 125757557 is 755757521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 755757521 = 67 ⋅11279963.

It can be written as a sum of positive squares in 2 ways, for example, as 22714756 + 103042801 = 4766^2 + 10151^2 .

It is a cyclic number.

It is not a de Polignac number, because 125757557 - 2²⁶ = 58648693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125757547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101294 + ... + 102527.

It is an arithmetic number, because the mean of its divisors is an integer number (31490499).

Almost surely, 2^125757557 is an apocalyptic number.

It is an amenable number.

125757557 is a deficient number, since it is larger than the sum of its proper divisors (204439).

125757557 is an equidigital number, since it uses as much as digits as its factorization.

125757557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204438.

The product of its digits is 428750, while the sum is 44.

The square root of 125757557 is about 11214.1676909167. The cubic root of 125757557 is about 501.0080423355.

The spelling of 125757557 in words is "one hundred twenty-five million, seven hundred fifty-seven thousand, five hundred fifty-seven".