645482 has 16 divisors (see below), whose sum is σ = 1036800. Its totient is φ = 300720.

The previous prime is 645481. The next prime is 645493. The reversal of 645482 is 284546.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (645481) 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 7 ways as a sum of consecutive naturals, for example, 1619 + ... + 1977.

It is an arithmetic number, because the mean of its divisors is an integer number (64800).

2⁶⁴⁵⁴⁸² is an apocalyptic number.

645482 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

645482 is a deficient number, since it is larger than the sum of its proper divisors (391318).

645482 is a wasteful number, since it uses less digits than its factorization.

645482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421.

The product of its digits is 7680, while the sum is 29.

The square root of 645482 is about 803.4189442626. The cubic root of 645482 is about 86.4227427841.

The spelling of 645482 in words is "six hundred forty-five thousand, four hundred eighty-two".