645326 has 8 divisors (see below), whose sum is σ = 1056024. Its totient is φ = 293320.

The previous prime is 645313. The next prime is 645329. The reversal of 645326 is 623546.

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

It is a d-powerful number, because it can be written as 6⁷ + 4⁴ + 3⁸ + 5⁷ + 2⁹ + 6⁷ .

It is a junction number, because it is equal to n+sod(n) for n = 645295 and 645304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645329) 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, 14645 + ... + 14688.

It is an arithmetic number, because the mean of its divisors is an integer number (132003).

2⁶⁴⁵³²⁶ is an apocalyptic number.

645326 is a deficient number, since it is larger than the sum of its proper divisors (410698).

645326 is a wasteful number, since it uses less digits than its factorization.

645326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29346.

The product of its digits is 4320, while the sum is 26.

The square root of 645326 is about 803.3218533066. The cubic root of 645326 is about 86.4157800110.

The spelling of 645326 in words is "six hundred forty-five thousand, three hundred twenty-six".