643292 has 24 divisors (see below), whose sum is σ = 1234800. Its totient is φ = 291456.

The previous prime is 643273. The next prime is 643301. The reversal of 643292 is 292346.

643292 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a d-powerful number, because it can be written as 6⁶ + 4⁸ + 2³ + 3⁵ + 9⁴ + 2¹⁹ .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 643292.

It is an unprimeable number.

643292 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4559 + ... + 4697.

It is an arithmetic number, because the mean of its divisors is an integer number (51450).

2⁶⁴³²⁹² is an apocalyptic number.

It is an amenable number.

643292 is a deficient number, since it is larger than the sum of its proper divisors (591508).

643292 is a wasteful number, since it uses less digits than its factorization.

643292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 243 counting only the distinct ones).

The product of its digits is 2592, while the sum is 26.

The square root of 643292 is about 802.0548609665. The cubic root of 643292 is about 86.3248932913.

643292 divided by its sum of digits (26) gives a palindrome (24742).

The spelling of 643292 in words is "six hundred forty-three thousand, two hundred ninety-two".