111153985 has 8 divisors (see below), whose sum is σ = 135901800. Its totient is φ = 87245184.

The previous prime is 111153983. The next prime is 111153997. The reversal of 111153985 is 589351111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1679616 + 109474369 = 1296^2 + 10463^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111153985 - 2¹ = 111153983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111153985.

It is not an unprimeable number, because it can be changed into a prime (111153983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209460 + ... + 209989.

It is an arithmetic number, because the mean of its divisors is an integer number (16987725).

Almost surely, 2^111153985 is an apocalyptic number.

It is an amenable number.

111153985 is a deficient number, since it is larger than the sum of its proper divisors (24747815).

111153985 is an equidigital number, since it uses as much as digits as its factorization.

111153985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419507.

The product of its digits is 5400, while the sum is 34.

The square root of 111153985 is about 10542.9590248658. The cubic root of 111153985 is about 480.8116836654.

The spelling of 111153985 in words is "one hundred eleven million, one hundred fifty-three thousand, nine hundred eighty-five".