42854839 has 2 divisors, whose sum is σ = 42854840. Its totient is φ = 42854838.

The previous prime is 42854821. The next prime is 42854863. The reversal of 42854839 is 93845824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42854839 - 2⁹ = 42854327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42854795 and 42854804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42854939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21427419 + 21427420.

It is an arithmetic number, because the mean of its divisors is an integer number (21427420).

Almost surely, 2^42854839 is an apocalyptic number.

42854839 is a deficient number, since it is larger than the sum of its proper divisors (1).

42854839 is an equidigital number, since it uses as much as digits as its factorization.

42854839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 43.

The square root of 42854839 is about 6546.3607447192. The cubic root of 42854839 is about 349.9451315349.

The spelling of 42854839 in words is "forty-two million, eight hundred fifty-four thousand, eight hundred thirty-nine".