42785143 has 4 divisors (see below), whose sum is σ = 42939880. Its totient is φ = 42630408.

The previous prime is 42785137. The next prime is 42785147. The reversal of 42785143 is 34158724.

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 42785143 - 2⁵ = 42785111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42785099 and 42785108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42785147) 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, 76953 + ... + 77506.

It is an arithmetic number, because the mean of its divisors is an integer number (10734970).

Almost surely, 2^42785143 is an apocalyptic number.

42785143 is a deficient number, since it is larger than the sum of its proper divisors (154737).

42785143 is a wasteful number, since it uses less digits than its factorization.

42785143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154736.

The product of its digits is 26880, while the sum is 34.

The square root of 42785143 is about 6541.0353156056. The cubic root of 42785143 is about 349.7553201442.

The spelling of 42785143 in words is "forty-two million, seven hundred eighty-five thousand, one hundred forty-three".