642359 has 2 divisors, whose sum is σ = 642360.
Its totient is φ = 642358.
The previous prime is 642281. The next prime is 642361. The reversal of 642359 is 953246.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 642359 - 212 = 638263 is a prime.
Together with 642361, it forms a pair of twin primes.
It is a Chen prime.
It is a d-powerful number, because it can be written as 6 + 42 + 3 + 215 + 57 + 96 .
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642359.
It is not a weakly prime, because it can be changed into another prime (644359) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321179 + 321180.
It is an arithmetic number, because the mean of its divisors is an integer number (321180).
2642359 is an apocalyptic number.
642359 is a deficient number, since it is larger than the sum of its proper divisors (1).
642359 is an equidigital number, since it uses as much as digits as its factorization.
642359 is an evil number, because the sum of its binary digits is even.
The product of its digits is 6480, while the sum is 29.
The square root of 642359 is about 801.4730188846.
The cubic root of 642359 is about 86.2831392644.
It can be divided in two parts, 642 and 359, that added together give a palindrome (1001).
The spelling of 642359 in words is "six hundred forty-two thousand, three hundred fifty-nine".