643226 has 8 divisors (see below), whose sum is σ = 1015680. Its totient is φ = 304668.

The previous prime is 643217. The next prime is 643231. The reversal of 643226 is 622346.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8426 + ... + 8501.

It is an arithmetic number, because the mean of its divisors is an integer number (126960).

2⁶⁴³²²⁶ is an apocalyptic number.

643226 is a deficient number, since it is larger than the sum of its proper divisors (372454).

643226 is a wasteful number, since it uses less digits than its factorization.

643226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16948.

The product of its digits is 1728, while the sum is 23.

The square root of 643226 is about 802.0137155934. The cubic root of 643226 is about 86.3219409577.

The spelling of 643226 in words is "six hundred forty-three thousand, two hundred twenty-six".