111661142 has 8 divisors (see below), whose sum is σ = 170652096. Its totient is φ = 54777112.

The previous prime is 111661141. The next prime is 111661181. The reversal of 111661142 is 241166111.

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 (111661141) 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, 526598 + ... + 526809.

It is an arithmetic number, because the mean of its divisors is an integer number (21331512).

Almost surely, 2^111661142 is an apocalyptic number.

111661142 is a deficient number, since it is larger than the sum of its proper divisors (58990954).

111661142 is a wasteful number, since it uses less digits than its factorization.

111661142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053462.

The product of its digits is 288, while the sum is 23.

The square root of 111661142 is about 10566.9835809468. The cubic root of 111661142 is about 481.5418331819.

The spelling of 111661142 in words is "one hundred eleven million, six hundred sixty-one thousand, one hundred forty-two".