111620143 has 4 divisors (see below), whose sum is σ = 112965048. Its totient is φ = 110275240.

The previous prime is 111620141. The next prime is 111620149. The reversal of 111620143 is 341026111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111620143 - 2¹ = 111620141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111620143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111620141) 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, 672328 + ... + 672493.

It is an arithmetic number, because the mean of its divisors is an integer number (28241262).

Almost surely, 2^111620143 is an apocalyptic number.

111620143 is a deficient number, since it is larger than the sum of its proper divisors (1344905).

111620143 is an equidigital number, since it uses as much as digits as its factorization.

111620143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344904.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 111620143 is about 10565.0434452491. The cubic root of 111620143 is about 481.4828895181.

Adding to 111620143 its reverse (341026111), we get a palindrome (452646254).

The spelling of 111620143 in words is "one hundred eleven million, six hundred twenty thousand, one hundred forty-three".