1643159 has 16 divisors (see below), whose sum is σ = 1976832. Its totient is φ = 1336608.

The previous prime is 1643141. The next prime is 1643171. The reversal of 1643159 is 9513461.

It is not a de Polignac number, because 1643159 - 2⁸ = 1642903 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1643129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15902 + ... + 16004.

It is an arithmetic number, because the mean of its divisors is an integer number (123552).

2^1643159 is an apocalyptic number.

1643159 is a deficient number, since it is larger than the sum of its proper divisors (333673).

1643159 is a wasteful number, since it uses less digits than its factorization.

1643159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206.

The product of its digits is 3240, while the sum is 29.

The square root of 1643159 is about 1281.8576364012. The cubic root of 1643159 is about 118.0030402358.

The spelling of 1643159 in words is "one million, six hundred forty-three thousand, one hundred fifty-nine".