16725643 has 16 divisors (see below), whose sum is σ = 19468800. Its totient is φ = 14208480.

The previous prime is 16725629. The next prime is 16725661. The reversal of 16725643 is 34652761.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-16725643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16725599 and 16725608.

It is not an unprimeable number, because it can be changed into a prime (16725043) 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, 16005 + ... + 17017.

It is an arithmetic number, because the mean of its divisors is an integer number (1216800).

Almost surely, 2^16725643 is an apocalyptic number.

16725643 is a deficient number, since it is larger than the sum of its proper divisors (2743157).

16725643 is a wasteful number, since it uses less digits than its factorization.

16725643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122.

The product of its digits is 30240, while the sum is 34.

The square root of 16725643 is about 4089.6996222217. The cubic root of 16725643 is about 255.7374169139.

The spelling of 16725643 in words is "sixteen million, seven hundred twenty-five thousand, six hundred forty-three".