111601625 has 16 divisors (see below), whose sum is σ = 140529168. Its totient is φ = 88480000.

The previous prime is 111601613. The next prime is 111601669. The reversal of 111601625 is 526106111.

It can be written as a sum of positive squares in 8 ways, for example, as 61418569 + 50183056 = 7837^2 + 7084^2 .

It is not a de Polignac number, because 111601625 - 2²⁰ = 110553049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111601625.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10175 + ... + 18075.

It is an arithmetic number, because the mean of its divisors is an integer number (8783073).

Almost surely, 2^111601625 is an apocalyptic number.

It is an amenable number.

111601625 is a deficient number, since it is larger than the sum of its proper divisors (28927543).

111601625 is an equidigital number, since it uses as much as digits as its factorization.

111601625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8029 (or 8019 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 111601625 is about 10564.1670282138. The cubic root of 111601625 is about 481.4562617278.

Adding to 111601625 its reverse (526106111), we get a palindrome (637707736).

The spelling of 111601625 in words is "one hundred eleven million, six hundred one thousand, six hundred twenty-five".