111131642 has 4 divisors (see below), whose sum is σ = 166697466. Its totient is φ = 55565820.

The previous prime is 111131611. The next prime is 111131659. The reversal of 111131642 is 246131111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246131111 = 19 ⋅12954269.

It can be written as a sum of positive squares in only one way, i.e., 67584841 + 43546801 = 8221^2 + 6599^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27782909 + ... + 27782912.

Almost surely, 2^111131642 is an apocalyptic number.

111131642 is a deficient number, since it is larger than the sum of its proper divisors (55565824).

111131642 is an equidigital number, since it uses as much as digits as its factorization.

111131642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55565823.

The product of its digits is 144, while the sum is 20.

The square root of 111131642 is about 10541.8993544807. The cubic root of 111131642 is about 480.7794656112.

Adding to 111131642 its reverse (246131111), we get a palindrome (357262753).

The spelling of 111131642 in words is "one hundred eleven million, one hundred thirty-one thousand, six hundred forty-two".