16643141 has 4 divisors (see below), whose sum is σ = 16657452. Its totient is φ = 16628832.

The previous prime is 16643117. The next prime is 16643177. The reversal of 16643141 is 14134661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10660225 + 5982916 = 3265^2 + 2446^2 .

It is a cyclic number.

It is not a de Polignac number, because 16643141 - 2²² = 12448837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16643141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16645141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5240 + ... + 7793.

It is an arithmetic number, because the mean of its divisors is an integer number (4164363).

Almost surely, 2^16643141 is an apocalyptic number.

It is an amenable number.

16643141 is a deficient number, since it is larger than the sum of its proper divisors (14311).

16643141 is a wasteful number, since it uses less digits than its factorization.

16643141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14310.

The product of its digits is 1728, while the sum is 26.

The square root of 16643141 is about 4079.6005931954. The cubic root of 16643141 is about 255.3162346024.

The spelling of 16643141 in words is "sixteen million, six hundred forty-three thousand, one hundred forty-one".