142220443 has 4 divisors (see below), whose sum is σ = 143601328. Its totient is φ = 140839560.

The previous prime is 142220413. The next prime is 142220447. The reversal of 142220443 is 344022241.

It is a happy number.

142220443 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, and also an emirpimes, since its reverse is a distinct semiprime: 344022241 = 4451 ⋅77291.

It is a cyclic number.

It is not a de Polignac number, because 142220443 - 2²⁵ = 108666011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142220447) 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, 690288 + ... + 690493.

It is an arithmetic number, because the mean of its divisors is an integer number (35900332).

Almost surely, 2^142220443 is an apocalyptic number.

142220443 is a deficient number, since it is larger than the sum of its proper divisors (1380885).

142220443 is a wasteful number, since it uses less digits than its factorization.

142220443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380884.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 142220443 is about 11925.6212836062. The cubic root of 142220443 is about 521.9801754532.

Adding to 142220443 its reverse (344022241), we get a palindrome (486242684).

The spelling of 142220443 in words is "one hundred forty-two million, two hundred twenty thousand, four hundred forty-three".