42772143 has 16 divisors (see below), whose sum is σ = 59786496. Its totient is φ = 27168960.

The previous prime is 42772123. The next prime is 42772159. The reversal of 42772143 is 34127724.

It is not a de Polignac number, because 42772143 - 2²⁰ = 41723567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42772143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42772123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1246 + ... + 9332.

It is an arithmetic number, because the mean of its divisors is an integer number (3736656).

Almost surely, 2^42772143 is an apocalyptic number.

42772143 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

42772143 is a deficient number, since it is larger than the sum of its proper divisors (17014353).

42772143 is a wasteful number, since it uses less digits than its factorization.

42772143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8174.

The product of its digits is 9408, while the sum is 30.

The square root of 42772143 is about 6540.0415136297. The cubic root of 42772143 is about 349.7198928952.

Adding to 42772143 its reverse (34127724), we get a palindrome (76899867).

The spelling of 42772143 in words is "forty-two million, seven hundred seventy-two thousand, one hundred forty-three".