111172025 has 12 divisors (see below), whose sum is σ = 138559212. Its totient is φ = 88482240.

The previous prime is 111172001. The next prime is 111172057. The reversal of 111172025 is 520271111.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1006009 + 110166016 = 1003^2 + 10496^2 .

It is not a de Polignac number, because 111172025 - 2¹⁰ = 111171001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111171988 and 111172006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6362 + ... + 16211.

It is an arithmetic number, because the mean of its divisors is an integer number (11546601).

Almost surely, 2^111172025 is an apocalyptic number.

It is an amenable number.

111172025 is a deficient number, since it is larger than the sum of its proper divisors (27387187).

111172025 is a wasteful number, since it uses less digits than its factorization.

111172025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22780 (or 22775 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 20.

The square root of 111172025 is about 10543.8145374433. The cubic root of 111172025 is about 480.8376937497.

The spelling of 111172025 in words is "one hundred eleven million, one hundred seventy-two thousand, twenty-five".