111642738 has 8 divisors (see below), whose sum is σ = 223285488. Its totient is φ = 37214244.

The previous prime is 111642737. The next prime is 111642761. The reversal of 111642738 is 837246111.

It is a sphenic number, since it is the product of 3 distinct primes.

111642738 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 111642699 and 111642708.

It is not an unprimeable number, because it can be changed into a prime (111642731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9303556 + ... + 9303567.

It is an arithmetic number, because the mean of its divisors is an integer number (27910686).

Almost surely, 2^111642738 is an apocalyptic number.

111642738 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

111642738 is a wasteful number, since it uses less digits than its factorization.

111642738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18607128.

The product of its digits is 8064, while the sum is 33.

The square root of 111642738 is about 10566.1127194442. The cubic root of 111642738 is about 481.5153758047.

Adding to 111642738 its reverse (837246111), we get a palindrome (948888849).

The spelling of 111642738 in words is "one hundred eleven million, six hundred forty-two thousand, seven hundred thirty-eight".