643162 has 16 divisors (see below), whose sum is σ = 1076040. Its totient is φ = 286272.

The previous prime is 643129. The next prime is 643183. The reversal of 643162 is 261346.

It can be written as a sum of positive squares in 4 ways, for example, as 281961 + 361201 = 531^2 + 601^2 .

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328 + ... + 1180.

2⁶⁴³¹⁶² is an apocalyptic number.

643162 is a deficient number, since it is larger than the sum of its proper divisors (432878).

643162 is a wasteful number, since it uses less digits than its factorization.

643162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897.

The product of its digits is 864, while the sum is 22.

The square root of 643162 is about 801.9738150339. The cubic root of 643162 is about 86.3190778958.

The spelling of 643162 in words is "six hundred forty-three thousand, one hundred sixty-two".