645324 has 12 divisors (see below), whose sum is σ = 1505784. Its totient is φ = 215104.

The previous prime is 645313. The next prime is 645329. The reversal of 645324 is 423546.

645324 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 645294 and 645303.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 645324.

It is not an unprimeable number, because it can be changed into a prime (645329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26877 + ... + 26900.

It is an arithmetic number, because the mean of its divisors is an integer number (125482).

2⁶⁴⁵³²⁴ is an apocalyptic number.

It is an amenable number.

645324 is an abundant number, since it is smaller than the sum of its proper divisors (860460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645324 is a wasteful number, since it uses less digits than its factorization.

645324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53784 (or 53782 counting only the distinct ones).

The product of its digits is 2880, while the sum is 24.

The square root of 645324 is about 803.3206084746. The cubic root of 645324 is about 86.4156907374.

It can be divided in two parts, 645 and 324, that added together give a palindrome (969).

The spelling of 645324 in words is "six hundred forty-five thousand, three hundred twenty-four".