125520555 has 32 divisors (see below), whose sum is σ = 218707200. Its totient is φ = 61229952.

The previous prime is 125520541. The next prime is 125520601. The reversal of 125520555 is 555025521.

It is not a de Polignac number, because 125520555 - 2⁶ = 125520491 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 672 + ... + 15858.

It is an arithmetic number, because the mean of its divisors is an integer number (6834600).

Almost surely, 2^125520555 is an apocalyptic number.

125520555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125520555 is a deficient number, since it is larger than the sum of its proper divisors (93186645).

125520555 is a wasteful number, since it uses less digits than its factorization.

125520555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15243.

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 125520555 is about 11203.5956281901. The cubic root of 125520555 is about 500.6931120807.

The spelling of 125520555 in words is "one hundred twenty-five million, five hundred twenty thousand, five hundred fifty-five".