111671742 has 128 divisors (see below), whose sum is σ = 297851904. Its totient is φ = 27076608.

The previous prime is 111671737. The next prime is 111671743. The reversal of 111671742 is 247176111.

It is a super-2 number, since 2×111671742² = 24941155922629128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111671743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 491833 + ... + 492059.

It is an arithmetic number, because the mean of its divisors is an integer number (2326968).

Almost surely, 2^111671742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111671742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148925952).

111671742 is an abundant number, since it is smaller than the sum of its proper divisors (186180162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111671742 is a wasteful number, since it uses less digits than its factorization.

111671742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322.

The product of its digits is 2352, while the sum is 30.

The square root of 111671742 is about 10567.4851312883. The cubic root of 111671742 is about 481.5570702997.

The spelling of 111671742 in words is "one hundred eleven million, six hundred seventy-one thousand, seven hundred forty-two".