645796 has 12 divisors (see below), whose sum is σ = 1196748. Its totient is φ = 303872.

The previous prime is 645787. The next prime is 645803. The reversal of 645796 is 697546.

645796 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 409600 = 486^2 + 640^2 .

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4681 + ... + 4816.

It is an arithmetic number, because the mean of its divisors is an integer number (99729).

2⁶⁴⁵⁷⁹⁶ is an apocalyptic number.

It is an amenable number.

645796 is a deficient number, since it is larger than the sum of its proper divisors (550952).

645796 is a wasteful number, since it uses less digits than its factorization.

645796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9518 (or 9516 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 645796 is about 803.6143353624. The cubic root of 645796 is about 86.4367541958.

It can be divided in two parts, 645 and 796, that added together give a palindrome (1441).

The spelling of 645796 in words is "six hundred forty-five thousand, seven hundred ninety-six".