125857555 has 4 divisors (see below), whose sum is σ = 151029072. Its totient is φ = 100686040.

The previous prime is 125857553. The next prime is 125857583. The reversal of 125857555 is 555758521.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 125857555 - 2¹ = 125857553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125857553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12585751 + ... + 12585760.

It is an arithmetic number, because the mean of its divisors is an integer number (37757268).

Almost surely, 2^125857555 is an apocalyptic number.

125857555 is a deficient number, since it is larger than the sum of its proper divisors (25171517).

125857555 is an equidigital number, since it uses as much as digits as its factorization.

125857555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25171516.

The product of its digits is 350000, while the sum is 43.

The square root of 125857555 is about 11218.6253614246. The cubic root of 125857555 is about 501.1408018295.

The spelling of 125857555 in words is "one hundred twenty-five million, eight hundred fifty-seven thousand, five hundred fifty-five".