643214 has 24 divisors (see below), whose sum is σ = 1146312. Its totient is φ = 268320.

The previous prime is 643213. The next prime is 643217. The reversal of 643214 is 412346.

It is a happy number.

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 643214.

It is not an unprimeable number, because it can be changed into a prime (643213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3632 + ... + 3804.

It is an arithmetic number, because the mean of its divisors is an integer number (47763).

2⁶⁴³²¹⁴ is an apocalyptic number.

643214 is a deficient number, since it is larger than the sum of its proper divisors (503098).

643214 is a wasteful number, since it uses less digits than its factorization.

643214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 199 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 643214 is about 802.0062343897. The cubic root of 643214 is about 86.3214041481.

It can be divided in two parts, 6432 and 14, that added together give a palindrome (6446).

The spelling of 643214 in words is "six hundred forty-three thousand, two hundred fourteen".