646285 has 8 divisors (see below), whose sum is σ = 816480. Its totient is φ = 489744.

The previous prime is 646273. The next prime is 646291. The reversal of 646285 is 582646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 646285 - 2⁵ = 646253 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3307 + ... + 3496.

It is an arithmetic number, because the mean of its divisors is an integer number (102060).

2⁶⁴⁶²⁸⁵ is an apocalyptic number.

It is an amenable number.

646285 is a deficient number, since it is larger than the sum of its proper divisors (170195).

646285 is a wasteful number, since it uses less digits than its factorization.

646285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6827.

The product of its digits is 11520, while the sum is 31.

The square root of 646285 is about 803.9185282104. The cubic root of 646285 is about 86.4585654741.

The spelling of 646285 in words is "six hundred forty-six thousand, two hundred eighty-five".