111161253 has 12 divisors (see below), whose sum is σ = 172413600. Its totient is φ = 63520632.

The previous prime is 111161243. The next prime is 111161269. The reversal of 111161253 is 352161111.

It is a happy number.

It is not a de Polignac number, because 111161253 - 2⁶ = 111161189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111161213) by changing a digit.

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, 377953 + ... + 378246.

It is an arithmetic number, because the mean of its divisors is an integer number (14367800).

Almost surely, 2^111161253 is an apocalyptic number.

It is an amenable number.

111161253 is a deficient number, since it is larger than the sum of its proper divisors (61252347).

111161253 is an equidigital number, since it uses as much as digits as its factorization.

111161253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756216 (or 756209 counting only the distinct ones).

The product of its digits is 180, while the sum is 21.

The square root of 111161253 is about 10543.3037042475. The cubic root of 111161253 is about 480.8221630112.

The spelling of 111161253 in words is "one hundred eleven million, one hundred sixty-one thousand, two hundred fifty-three".