111631142 has 8 divisors (see below), whose sum is σ = 191367696. Its totient is φ = 47841912.

The previous prime is 111631141. The next prime is 111631147. The reversal of 111631142 is 241136111.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111631141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3986813 + ... + 3986840.

It is an arithmetic number, because the mean of its divisors is an integer number (23920962).

Almost surely, 2^111631142 is an apocalyptic number.

111631142 is a deficient number, since it is larger than the sum of its proper divisors (79736554).

111631142 is an equidigital number, since it uses as much as digits as its factorization.

111631142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7973662.

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

The square root of 111631142 is about 10565.5639698030. The cubic root of 111631142 is about 481.4987040363.

Adding to 111631142 its reverse (241136111), we get a palindrome (352767253).

The spelling of 111631142 in words is "one hundred eleven million, six hundred thirty-one thousand, one hundred forty-two".