420855 has 8 divisors (see below), whose sum is σ = 673392. Its totient is φ = 224448.
The previous prime is 420853. The next prime is 420857. The reversal of 420855 is 558024.
It is an interprime number because it is at equal distance from previous prime (420853) and next prime (420857).
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 420855 - 21 = 420853 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (420851) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14014 + ... + 14043.
It is an arithmetic number, because the mean of its divisors is an integer number (84174).
2420855 is an apocalyptic number.
420855 is a deficient number, since it is larger than the sum of its proper divisors (252537).
420855 is a wasteful number, since it uses less digits than its factorization.
420855 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 28065.
The product of its (nonzero) digits is 1600, while the sum is 24.
The square root of 420855 is about 648.7333812900. The cubic root of 420855 is about 74.9395067763.
Adding to 420855 its reverse (558024), we get a palindrome (978879).
It can be divided in two parts, 420 and 855, that added together give a triangular number (1275 = T50).
The spelling of 420855 in words is "four hundred twenty thousand, eight hundred fifty-five".
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