18117125 has 16 divisors (see below), whose sum is σ = 24351600. Its totient is φ = 13377600.

The previous prime is 18117119. The next prime is 18117167. The reversal of 18117125 is 52171181.

It can be written as a sum of positive squares in 8 ways, for example, as 11142244 + 6974881 = 3338^2 + 2641^2 .

It is not a de Polignac number, because 18117125 - 2⁸ = 18116869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18117094 and 18117103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3950 + ... + 7199.

It is an arithmetic number, because the mean of its divisors is an integer number (1521975).

Almost surely, 2^18117125 is an apocalyptic number.

It is an amenable number.

18117125 is a deficient number, since it is larger than the sum of its proper divisors (6234475).

18117125 is a wasteful number, since it uses less digits than its factorization.

18117125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11177 (or 11167 counting only the distinct ones).

The product of its digits is 560, while the sum is 26.

The square root of 18117125 is about 4256.4216191538. The cubic root of 18117125 is about 262.6413448911.

The spelling of 18117125 in words is "eighteen million, one hundred seventeen thousand, one hundred twenty-five".