125990557 has 16 divisors (see below), whose sum is σ = 157352832. Its totient is φ = 98003520.

The previous prime is 125990551. The next prime is 125990561. The reversal of 125990557 is 755099521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 125990557 - 2¹¹ = 125988509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125990551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60343 + ... + 62395.

It is an arithmetic number, because the mean of its divisors is an integer number (9834552).

Almost surely, 2^125990557 is an apocalyptic number.

It is an amenable number.

125990557 is a deficient number, since it is larger than the sum of its proper divisors (31362275).

125990557 is a wasteful number, since it uses less digits than its factorization.

125990557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2868.

The product of its (nonzero) digits is 141750, while the sum is 43.

The square root of 125990557 is about 11224.5515277894. The cubic root of 125990557 is about 501.3172692226.

The spelling of 125990557 in words is "one hundred twenty-five million, nine hundred ninety thousand, five hundred fifty-seven".