42722143 has 4 divisors (see below), whose sum is σ = 43422568. Its totient is φ = 42021720.

The previous prime is 42722131. The next prime is 42722149. The reversal of 42722143 is 34122724.

It is a happy number.

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 42722143 - 2⁵ = 42722111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42722149) 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, 350121 + ... + 350242.

It is an arithmetic number, because the mean of its divisors is an integer number (10855642).

Almost surely, 2^42722143 is an apocalyptic number.

42722143 is a deficient number, since it is larger than the sum of its proper divisors (700425).

42722143 is an equidigital number, since it uses as much as digits as its factorization.

42722143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700424.

The product of its digits is 2688, while the sum is 25.

The square root of 42722143 is about 6536.2177901291. The cubic root of 42722143 is about 349.5835673067.

Adding to 42722143 its reverse (34122724), we get a palindrome (76844867).

The spelling of 42722143 in words is "forty-two million, seven hundred twenty-two thousand, one hundred forty-three".