646594 has 12 divisors (see below), whose sum is σ = 1050786. Its totient is φ = 298272.

The previous prime is 646577. The next prime is 646609. The reversal of 646594 is 495646.

It can be written as a sum of positive squares in 3 ways, for example, as 455625 + 190969 = 675^2 + 437^2 .

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 5 ways as a sum of consecutive naturals, for example, 619 + ... + 1294.

2⁶⁴⁶⁵⁹⁴ is an apocalyptic number.

646594 is a deficient number, since it is larger than the sum of its proper divisors (404192).

646594 is a wasteful number, since it uses less digits than its factorization.

646594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941 (or 1928 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 646594 is about 804.1106888980. The cubic root of 646594 is about 86.4723423889.

The spelling of 646594 in words is "six hundred forty-six thousand, five hundred ninety-four".