125993557 has 8 divisors (see below), whose sum is σ = 127639512. Its totient is φ = 124358400.

The previous prime is 125993521. The next prime is 125993587. The reversal of 125993557 is 755399521.

It can be written as a sum of positive squares in 4 ways, for example, as 1425636 + 124567921 = 1194^2 + 11161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125993557 - 2¹⁵ = 125960789 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 (125993507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22257 + ... + 27337.

It is an arithmetic number, because the mean of its divisors is an integer number (15954939).

Almost surely, 2^125993557 is an apocalyptic number.

It is an amenable number.

125993557 is a deficient number, since it is larger than the sum of its proper divisors (1645955).

125993557 is a wasteful number, since it uses less digits than its factorization.

125993557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5399.

The product of its digits is 425250, while the sum is 46.

The square root of 125993557 is about 11224.6851626226. The cubic root of 125993557 is about 501.3212481977.

The spelling of 125993557 in words is "one hundred twenty-five million, nine hundred ninety-three thousand, five hundred fifty-seven".