646258 has 8 divisors (see below), whose sum is σ = 973440. Its totient is φ = 321780.

The previous prime is 646253. The next prime is 646259. The reversal of 646258 is 852646.

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

It is not an unprimeable number, because it can be changed into a prime (646253) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 103 + ... + 1141.

It is an arithmetic number, because the mean of its divisors is an integer number (121680).

2⁶⁴⁶²⁵⁸ is an apocalyptic number.

646258 is a deficient number, since it is larger than the sum of its proper divisors (327182).

646258 is a wasteful number, since it uses less digits than its factorization.

646258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352.

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

The square root of 646258 is about 803.9017352886. The cubic root of 646258 is about 86.4573614574.

It can be divided in two parts, 6 and 46258, that added together give a palindrome (46264).

The spelling of 646258 in words is "six hundred forty-six thousand, two hundred fifty-eight".