42859 has 2 divisors, whose sum is σ = 42860.
Its totient is φ = 42858.
The previous prime is 42853. The next prime is 42863. The reversal of 42859 is 95824.
42859 = 822 + 832 + ... + 872.
It is a happy number.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 42859 - 213 = 34667 is a prime.
It is an Ulam number.
It is a plaindrome in base 13.
It is a nialpdrome in base 15.
It is not a weakly prime, because it can be changed into another prime (42853) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21429 + 21430.
It is an arithmetic number, because the mean of its divisors is an integer number (21430).
242859 is an apocalyptic number.
42859 is a deficient number, since it is larger than the sum of its proper divisors (1).
42859 is an equidigital number, since it uses as much as digits as its factorization.
42859 is an evil number, because the sum of its binary digits is even.
The product of its digits is 2880, while the sum is 28.
The square root of 42859 is about 207.0241531803.
The cubic root of 42859 is about 34.9956457168.
It can be divided in two parts, 428 and 59, that multiplied together give a palindrome (25252).
The spelling of 42859 in words is "forty-two thousand, eight hundred fifty-nine".