111540865 has 8 divisors (see below), whose sum is σ = 135174888. Its totient is φ = 88348800.

The previous prime is 111540851. The next prime is 111540901. The reversal of 111540865 is 568045111.

It can be written as a sum of positive squares in 4 ways, for example, as 70157376 + 41383489 = 8376^2 + 6433^2 .

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

It is not a de Polignac number, because 111540865 - 2⁵ = 111540833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109932 + ... + 110941.

It is an arithmetic number, because the mean of its divisors is an integer number (16896861).

Almost surely, 2^111540865 is an apocalyptic number.

It is an amenable number.

111540865 is a deficient number, since it is larger than the sum of its proper divisors (23634023).

111540865 is a wasteful number, since it uses less digits than its factorization.

111540865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220979.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 111540865 is about 10561.2908775395. The cubic root of 111540865 is about 481.3688717431.

Adding to 111540865 its reverse (568045111), we get a palindrome (679585976).

The spelling of 111540865 in words is "one hundred eleven million, five hundred forty thousand, eight hundred sixty-five".