111042309 has 16 divisors (see below), whose sum is σ = 173335680. Its totient is φ = 61904640.

The previous prime is 111042301. The next prime is 111042311. The reversal of 111042309 is 903240111.

It is not a de Polignac number, because 111042309 - 2³ = 111042301 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 (111042301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63624 + ... + 65345.

It is an arithmetic number, because the mean of its divisors is an integer number (10833480).

Almost surely, 2^111042309 is an apocalyptic number.

It is an amenable number.

111042309 is a deficient number, since it is larger than the sum of its proper divisors (62293371).

111042309 is a wasteful number, since it uses less digits than its factorization.

111042309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129020.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 111042309 is about 10537.6614578378. The cubic root of 111042309 is about 480.6506064652.

The spelling of 111042309 in words is "one hundred eleven million, forty-two thousand, three hundred nine".