111542644 has 12 divisors (see below), whose sum is σ = 206682084. Its totient is φ = 52490624.

The previous prime is 111542623. The next prime is 111542647. The reversal of 111542644 is 446245111.

It can be written as a sum of positive squares in 2 ways, for example, as 100400400 + 11142244 = 10020^2 + 3338^2 .

It is a super-2 number, since 2×111542644² = 24883522861021472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111542647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820099 + ... + 820234.

It is an arithmetic number, because the mean of its divisors is an integer number (17223507).

Almost surely, 2^111542644 is an apocalyptic number.

It is an amenable number.

111542644 is a deficient number, since it is larger than the sum of its proper divisors (95139440).

111542644 is a wasteful number, since it uses less digits than its factorization.

111542644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640354 (or 1640352 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 111542644 is about 10561.3750998627. The cubic root of 111542644 is about 481.3714308968.

Adding to 111542644 its reverse (446245111), we get a palindrome (557787755).

The spelling of 111542644 in words is "one hundred eleven million, five hundred forty-two thousand, six hundred forty-four".