42859849 has 2 divisors, whose sum is σ = 42859850. Its totient is φ = 42859848.

The previous prime is 42859847. The next prime is 42859853. The reversal of 42859849 is 94895824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24950025 + 17909824 = 4995^2 + 4232^2 .

It is a cyclic number.

It is not a de Polignac number, because 42859849 - 2¹ = 42859847 is a prime.

Together with 42859847, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42859847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21429924 + 21429925.

It is an arithmetic number, because the mean of its divisors is an integer number (21429925).

Almost surely, 2^42859849 is an apocalyptic number.

It is an amenable number.

42859849 is a deficient number, since it is larger than the sum of its proper divisors (1).

42859849 is an equidigital number, since it uses as much as digits as its factorization.

42859849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 49.

The square root of 42859849 is about 6546.7433888919. The cubic root of 42859849 is about 349.9587679319.

The spelling of 42859849 in words is "forty-two million, eight hundred fifty-nine thousand, eight hundred forty-nine".