111285125 has 24 divisors (see below), whose sum is σ = 161567640. Its totient is φ = 76305600.

The previous prime is 111285121. The next prime is 111285137. The reversal of 111285125 is 521582111.

It can be written as a sum of positive squares in 4 ways, for example, as 17698849 + 93586276 = 4207^2 + 9674^2 .

It is not a de Polignac number, because 111285125 - 2² = 111285121 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111285094 and 111285103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111285121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2960 + ... + 15209.

It is an arithmetic number, because the mean of its divisors is an integer number (6731985).

Almost surely, 2^111285125 is an apocalyptic number.

It is an amenable number.

111285125 is a deficient number, since it is larger than the sum of its proper divisors (50282515).

111285125 is an equidigital number, since it uses as much as digits as its factorization.

111285125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18198 (or 18181 counting only the distinct ones).

The product of its digits is 800, while the sum is 26.

The square root of 111285125 is about 10549.1765081451. The cubic root of 111285125 is about 481.0006973219. Note that the first 3 decimals are identical.

The spelling of 111285125 in words is "one hundred eleven million, two hundred eighty-five thousand, one hundred twenty-five".