643325 has 6 divisors (see below), whose sum is σ = 797754. Its totient is φ = 514640.

The previous prime is 643303. The next prime is 643369. The reversal of 643325 is 523346.

It can be written as a sum of positive squares in 3 ways, for example, as 121 + 643204 = 11^2 + 802^2 .

It is not a de Polignac number, because 643325 - 2¹⁸ = 381181 is a prime.

It is a d-powerful number, because it can be written as 6 + 4⁴ + 3⁶ + 3¹² + 2¹⁵ + 5⁷ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 643325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12842 + ... + 12891.

It is an arithmetic number, because the mean of its divisors is an integer number (132959).

2⁶⁴³³²⁵ is an apocalyptic number.

It is an amenable number.

643325 is a deficient number, since it is larger than the sum of its proper divisors (154429).

643325 is a wasteful number, since it uses less digits than its factorization.

643325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25743 (or 25738 counting only the distinct ones).

The product of its digits is 2160, while the sum is 23.

The square root of 643325 is about 802.0754328615. The cubic root of 643325 is about 86.3263693824.

The spelling of 643325 in words is "six hundred forty-three thousand, three hundred twenty-five".