111681345 has 16 divisors (see below), whose sum is σ = 179307072. Its totient is φ = 59357760.

The previous prime is 111681343. The next prime is 111681377. The reversal of 111681345 is 543186111.

It is not a de Polignac number, because 111681345 - 2¹ = 111681343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111681341) 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, 8311 + ... + 17100.

It is an arithmetic number, because the mean of its divisors is an integer number (11206692).

Almost surely, 2^111681345 is an apocalyptic number.

111681345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111681345 is a deficient number, since it is larger than the sum of its proper divisors (67625727).

111681345 is a wasteful number, since it uses less digits than its factorization.

111681345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25712.

The product of its digits is 2880, while the sum is 30.

The square root of 111681345 is about 10567.9394869577. The cubic root of 111681345 is about 481.5708734335.

The spelling of 111681345 in words is "one hundred eleven million, six hundred eighty-one thousand, three hundred forty-five".