111201605 has 8 divisors (see below), whose sum is σ = 134623512. Its totient is φ = 88173568.

The previous prime is 111201593. The next prime is 111201611. The reversal of 111201605 is 506102111.

It can be written as a sum of positive squares in 4 ways, for example, as 6466849 + 104734756 = 2543^2 + 10234^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 111201605 - 2⁴ = 111201589 is a prime.

It is a Duffinian number.

It is a congruent 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, 97844 + ... + 98973.

It is an arithmetic number, because the mean of its divisors is an integer number (16827939).

Almost surely, 2^111201605 is an apocalyptic number.

It is an amenable number.

111201605 is a deficient number, since it is larger than the sum of its proper divisors (23421907).

111201605 is a wasteful number, since it uses less digits than its factorization.

111201605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196935.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 111201605 is about 10545.2171622968. The cubic root of 111201605 is about 480.8803361252.

Adding to 111201605 its reverse (506102111), we get a palindrome (617303716).

The spelling of 111201605 in words is "one hundred eleven million, two hundred one thousand, six hundred five".