125131555 has 4 divisors (see below), whose sum is σ = 150157872. Its totient is φ = 100105240.

The previous prime is 125131529. The next prime is 125131583. The reversal of 125131555 is 555131521.

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

It is not a de Polignac number, because 125131555 - 2¹¹ = 125129507 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12513151 + ... + 12513160.

It is an arithmetic number, because the mean of its divisors is an integer number (37539468).

Almost surely, 2^125131555 is an apocalyptic number.

125131555 is a deficient number, since it is larger than the sum of its proper divisors (25026317).

125131555 is an equidigital number, since it uses as much as digits as its factorization.

125131555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25026316.

The product of its digits is 3750, while the sum is 28.

The square root of 125131555 is about 11186.2216588087. The cubic root of 125131555 is about 500.1753451676.

The spelling of 125131555 in words is "one hundred twenty-five million, one hundred thirty-one thousand, five hundred fifty-five".