125000018 has 24 divisors (see below), whose sum is σ = 221954124. Its totient is φ = 52446240.

The previous prime is 125000003. The next prime is 125000077. The reversal of 125000018 is 810000521.

It can be written as a sum of positive squares in 2 ways, for example, as 124166449 + 833569 = 11143^2 + 913^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16721 + ... + 23012.

Almost surely, 2^125000018 is an apocalyptic number.

125000018 is a deficient number, since it is larger than the sum of its proper divisors (96954106).

125000018 is a wasteful number, since it uses less digits than its factorization.

125000018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39770 (or 39759 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 125000018 is about 11180.3406924834. The cubic root of 125000018 is about 500.0000240000. Note that the first 4 decimals are identical.

Adding to 125000018 its reverse (810000521), we get a palindrome (935000539).

The spelling of 125000018 in words is "one hundred twenty-five million, eighteen", and thus it is an aban number.