111952861 has 8 divisors (see below), whose sum is σ = 115137720. Its totient is φ = 108776448.

The previous prime is 111952859. The next prime is 111952889. The reversal of 111952861 is 168259111.

It can be written as a sum of positive squares in 4 ways, for example, as 25351225 + 86601636 = 5035^2 + 9306^2 .

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

It is not a de Polignac number, because 111952861 - 2¹ = 111952859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111952831) 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, 32745 + ... + 36001.

It is an arithmetic number, because the mean of its divisors is an integer number (14392215).

Almost surely, 2^111952861 is an apocalyptic number.

It is an amenable number.

111952861 is a deficient number, since it is larger than the sum of its proper divisors (3184859).

111952861 is an equidigital number, since it uses as much as digits as its factorization.

111952861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4223.

The product of its digits is 4320, while the sum is 34.

The square root of 111952861 is about 10580.7779014589. Note that the first 3 decimals coincide. The cubic root of 111952861 is about 481.9608173356.

The spelling of 111952861 in words is "one hundred eleven million, nine hundred fifty-two thousand, eight hundred sixty-one".