42756143 has 4 divisors (see below), whose sum is σ = 43297440. Its totient is φ = 42214848.

The previous prime is 42756097. The next prime is 42756151. The reversal of 42756143 is 34165724.

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 42756143 - 2⁶ = 42756079 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 (42756443) 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, 270530 + ... + 270687.

It is an arithmetic number, because the mean of its divisors is an integer number (10824360).

Almost surely, 2^42756143 is an apocalyptic number.

42756143 is a deficient number, since it is larger than the sum of its proper divisors (541297).

42756143 is an equidigital number, since it uses as much as digits as its factorization.

42756143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541296.

The product of its digits is 20160, while the sum is 32.

The square root of 42756143 is about 6538.8181653874. The cubic root of 42756143 is about 349.6762802714.

The spelling of 42756143 in words is "forty-two million, seven hundred fifty-six thousand, one hundred forty-three".