111111045 has 32 divisors (see below), whose sum is σ = 186181632. Its totient is φ = 56476992.

The previous prime is 111111041. The next prime is 111111061. The reversal of 111111045 is 540111111.

It is not a de Polignac number, because 111111045 - 2² = 111111041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152472 + ... + 153198.

It is an arithmetic number, because the mean of its divisors is an integer number (5818176).

Almost surely, 2^111111045 is an apocalyptic number.

111111045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111111045 is a deficient number, since it is larger than the sum of its proper divisors (75070587).

111111045 is a wasteful number, since it uses less digits than its factorization.

111111045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201.

The product of its (nonzero) digits is 20, while the sum is 15.

The square root of 111111045 is about 10540.9223979688. The cubic root of 111111045 is about 480.7497614204.

Adding to 111111045 its reverse (540111111), we get a palindrome (651222156).

It can be divided in two parts, 111 and 111045, that added together give a triangular number (111156 = T₄₇₁).

The spelling of 111111045 in words is "one hundred eleven million, one hundred eleven thousand, forty-five".