643159 has 8 divisors (see below), whose sum is σ = 714240. Its totient is φ = 574200.

The previous prime is 643129. The next prime is 643183. The reversal of 643159 is 951346.

643159 = 7² + 8² + ... + 124².

643159 = 19³ + 20³ + ... + 40³.

643159 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 643159 - 2⁷ = 643031 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154 + ... + 1144.

It is an arithmetic number, because the mean of its divisors is an integer number (89280).

2⁶⁴³¹⁵⁹ is an apocalyptic number.

643159 is a deficient number, since it is larger than the sum of its proper divisors (71081).

643159 is a wasteful number, since it uses less digits than its factorization.

643159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061.

The product of its digits is 3240, while the sum is 28.

The square root of 643159 is about 801.9719446464. The cubic root of 643159 is about 86.3189436852.

It can be divided in two parts, 64 and 3159, that added together give a palindrome (3223).

The spelling of 643159 in words is "six hundred forty-three thousand, one hundred fifty-nine".