111661725 has 48 divisors (see below), whose sum is σ = 215021952. Its totient is φ = 50069760.

The previous prime is 111661723. The next prime is 111661777. The reversal of 111661725 is 527166111.

It is not a de Polignac number, because 111661725 - 2¹ = 111661723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111661692 and 111661701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111661723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25819 + ... + 29831.

It is an arithmetic number, because the mean of its divisors is an integer number (4479624).

Almost surely, 2^111661725 is an apocalyptic number.

111661725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111661725 is a deficient number, since it is larger than the sum of its proper divisors (103360227).

111661725 is a wasteful number, since it uses less digits than its factorization.

111661725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4086 (or 4081 counting only the distinct ones).

The product of its digits is 2520, while the sum is 30.

The square root of 111661725 is about 10567.0111668343. The cubic root of 111661725 is about 481.5426712484.

The spelling of 111661725 in words is "one hundred eleven million, six hundred sixty-one thousand, seven hundred twenty-five".