125557 has 8 divisors (see below), whose sum is σ = 134784. Its totient is φ = 116688.

The previous prime is 125551. The next prime is 125591. The reversal of 125557 is 755521.

It is a happy number.

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 125557 - 2⁷ = 125429 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125551) 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, 1168 + ... + 1270.

It is an arithmetic number, because the mean of its divisors is an integer number (16848).

2¹²⁵⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

125557 is a deficient number, since it is larger than the sum of its proper divisors (9227).

125557 is a wasteful number, since it uses less digits than its factorization.

125557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179.

The product of its digits is 1750, while the sum is 25.

The square root of 125557 is about 354.3402319805. The cubic root of 125557 is about 50.0741566282.

The spelling of 125557 in words is "one hundred twenty-five thousand, five hundred fifty-seven".