125166555 has 24 divisors (see below), whose sum is σ = 217945728. Its totient is φ = 66450816.

The previous prime is 125166551. The next prime is 125166577. The reversal of 125166555 is 555661521.

It is not a de Polignac number, because 125166555 - 2² = 125166551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125166551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3799 + ... + 16271.

It is an arithmetic number, because the mean of its divisors is an integer number (9081072).

Almost surely, 2^125166555 is an apocalyptic number.

125166555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125166555 is a deficient number, since it is larger than the sum of its proper divisors (92779173).

125166555 is a wasteful number, since it uses less digits than its factorization.

125166555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12707 (or 12704 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 125166555 is about 11187.7859739986. The cubic root of 125166555 is about 500.2219747732.

The spelling of 125166555 in words is "one hundred twenty-five million, one hundred sixty-six thousand, five hundred fifty-five".