142111443 has 4 divisors (see below), whose sum is σ = 189481928. Its totient is φ = 94740960.

The previous prime is 142111439. The next prime is 142111451. The reversal of 142111443 is 344111241.

142111443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 142111443 - 2² = 142111439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142111493) 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, 23685238 + ... + 23685243.

It is an arithmetic number, because the mean of its divisors is an integer number (47370482).

Almost surely, 2^142111443 is an apocalyptic number.

142111443 is a deficient number, since it is larger than the sum of its proper divisors (47370485).

142111443 is an equidigital number, since it uses as much as digits as its factorization.

142111443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47370484.

The product of its digits is 384, while the sum is 21.

The square root of 142111443 is about 11921.0504151270. The cubic root of 142111443 is about 521.8467900800.

Adding to 142111443 its reverse (344111241), we get a palindrome (486222684).

The spelling of 142111443 in words is "one hundred forty-two million, one hundred eleven thousand, four hundred forty-three".