111161275 has 6 divisors (see below), whose sum is σ = 137840012. Its totient is φ = 88929000.

The previous prime is 111161269. The next prime is 111161279. The reversal of 111161275 is 572161111.

It is not a de Polignac number, because 111161275 - 2⁵ = 111161243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 4446451 = 111161275 / (1 + 1 + 1 + 1 + 6 + 1 + 2 + 7 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111161279) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2223201 + ... + 2223250.

Almost surely, 2^111161275 is an apocalyptic number.

111161275 is a deficient number, since it is larger than the sum of its proper divisors (26678737).

111161275 is an equidigital number, since it uses as much as digits as its factorization.

111161275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4446461 (or 4446456 counting only the distinct ones).

The product of its digits is 420, while the sum is 25.

The square root of 111161275 is about 10543.3047475637. The cubic root of 111161275 is about 480.8221947312.

The spelling of 111161275 in words is "one hundred eleven million, one hundred sixty-one thousand, two hundred seventy-five".