42861859 has 2 divisors, whose sum is σ = 42861860. Its totient is φ = 42861858.

The previous prime is 42861839. The next prime is 42861893. The reversal of 42861859 is 95816824.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42861859 - 2⁵ = 42861827 is a prime.

It is not a weakly prime, because it can be changed into another prime (42861829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21430929 + 21430930.

It is an arithmetic number, because the mean of its divisors is an integer number (21430930).

Almost surely, 2^42861859 is an apocalyptic number.

42861859 is a deficient number, since it is larger than the sum of its proper divisors (1).

42861859 is an equidigital number, since it uses as much as digits as its factorization.

42861859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 43.

The square root of 42861859 is about 6546.8968985314. The cubic root of 42861859 is about 349.9642385230.

The spelling of 42861859 in words is "forty-two million, eight hundred sixty-one thousand, eight hundred fifty-nine".