111155145 has 16 divisors (see below), whose sum is σ = 177999360. Its totient is φ = 59232384.

The previous prime is 111155137. The next prime is 111155147. The reversal of 111155145 is 541551111.

It is not a de Polignac number, because 111155145 - 2³ = 111155137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111155147) 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, 21141 + ... + 25869.

It is an arithmetic number, because the mean of its divisors is an integer number (11124960).

Almost surely, 2^111155145 is an apocalyptic number.

111155145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111155145 is a deficient number, since it is larger than the sum of its proper divisors (66844215).

111155145 is a wasteful number, since it uses less digits than its factorization.

111155145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6304.

The product of its digits is 500, while the sum is 24.

The square root of 111155145 is about 10543.0140377408. The cubic root of 111155145 is about 480.8133562388.

The spelling of 111155145 in words is "one hundred eleven million, one hundred fifty-five thousand, one hundred forty-five".