125107985 has 4 divisors (see below), whose sum is σ = 150129588. Its totient is φ = 100086384.

The previous prime is 125107979. The next prime is 125107987. The reversal of 125107985 is 589701521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 69022864 + 56085121 = 8308^2 + 7489^2 .

It is a cyclic number.

It is not a de Polignac number, because 125107985 - 2⁶ = 125107921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125107987) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12510794 + ... + 12510803.

It is an arithmetic number, because the mean of its divisors is an integer number (37532397).

Almost surely, 2^125107985 is an apocalyptic number.

It is an amenable number.

125107985 is a deficient number, since it is larger than the sum of its proper divisors (25021603).

125107985 is an equidigital number, since it uses as much as digits as its factorization.

125107985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25021602.

The product of its (nonzero) digits is 25200, while the sum is 38.

The square root of 125107985 is about 11185.1680809901. The cubic root of 125107985 is about 500.1439385594.

The spelling of 125107985 in words is "one hundred twenty-five million, one hundred seven thousand, nine hundred eighty-five".