111125980 has 24 divisors (see below), whose sum is σ = 266702688. Its totient is φ = 38100288.

The previous prime is 111125977. The next prime is 111125981. The reversal of 111125980 is 89521111.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111125981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396739 + ... + 397018.

It is an arithmetic number, because the mean of its divisors is an integer number (11112612).

Almost surely, 2^111125980 is an apocalyptic number.

111125980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111125980 is an abundant number, since it is smaller than the sum of its proper divisors (155576708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111125980 is a wasteful number, since it uses less digits than its factorization.

111125980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793773 (or 793771 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 28.

The square root of 111125980 is about 10541.6308036281. The cubic root of 111125980 is about 480.7713004612.

The spelling of 111125980 in words is "one hundred eleven million, one hundred twenty-five thousand, nine hundred eighty".