111520145 has 8 divisors (see below), whose sum is σ = 145990080. Its totient is φ = 81105520.

The previous prime is 111520133. The next prime is 111520147. The reversal of 111520145 is 541025111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-111520145 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111520147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1013765 + ... + 1013874.

It is an arithmetic number, because the mean of its divisors is an integer number (18248760).

Almost surely, 2^111520145 is an apocalyptic number.

It is an amenable number.

111520145 is a deficient number, since it is larger than the sum of its proper divisors (34469935).

111520145 is a wasteful number, since it uses less digits than its factorization.

111520145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027655.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 111520145 is about 10560.3098912863. The cubic root of 111520145 is about 481.3390632937.

Adding to 111520145 its reverse (541025111), we get a palindrome (652545256).

The spelling of 111520145 in words is "one hundred eleven million, five hundred twenty thousand, one hundred forty-five".