111990125 has 16 divisors (see below), whose sum is σ = 150516912. Its totient is φ = 82699200.

The previous prime is 111990107. The next prime is 111990133. The reversal of 111990125 is 521099111.

It can be written as a sum of positive squares in 8 ways, for example, as 66373609 + 45616516 = 8147^2 + 6754^2 .

It is not a de Polignac number, because 111990125 - 2⁶ = 111990061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32834 + ... + 36083.

It is an arithmetic number, because the mean of its divisors is an integer number (9407307).

Almost surely, 2^111990125 is an apocalyptic number.

It is an amenable number.

111990125 is a deficient number, since it is larger than the sum of its proper divisors (38526787).

111990125 is an equidigital number, since it uses as much as digits as its factorization.

111990125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68945 (or 68935 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 29.

The square root of 111990125 is about 10582.5386840777. The cubic root of 111990125 is about 482.0142856598.

The spelling of 111990125 in words is "one hundred eleven million, nine hundred ninety thousand, one hundred twenty-five".