42850039 has 2 divisors, whose sum is σ = 42850040. Its totient is φ = 42850038.

The previous prime is 42850037. The next prime is 42850069. The reversal of 42850039 is 93005824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42850039 - 2¹ = 42850037 is a prime.

It is a super-2 number, since 2×42850039² = 3672251684603042, which contains 22 as substring.

Together with 42850037, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42850037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21425019 + 21425020.

It is an arithmetic number, because the mean of its divisors is an integer number (21425020).

Almost surely, 2^42850039 is an apocalyptic number.

42850039 is a deficient number, since it is larger than the sum of its proper divisors (1).

42850039 is an equidigital number, since it uses as much as digits as its factorization.

42850039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 42850039 is about 6545.9941185430. The cubic root of 42850039 is about 349.9320657265.

The spelling of 42850039 in words is "forty-two million, eight hundred fifty thousand, thirty-nine".