16543061 has 4 divisors (see below), whose sum is σ = 16554252. Its totient is φ = 16531872.

The previous prime is 16543027. The next prime is 16543063. The reversal of 16543061 is 16034561.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3976036 + 12567025 = 1994^2 + 3545^2 .

It is a cyclic number.

It is not a de Polignac number, because 16543061 - 2⁶ = 16542997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16543061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16543063) 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, 2966 + ... + 6471.

It is an arithmetic number, because the mean of its divisors is an integer number (4138563).

Almost surely, 2^16543061 is an apocalyptic number.

It is an amenable number.

16543061 is a deficient number, since it is larger than the sum of its proper divisors (11191).

16543061 is an equidigital number, since it uses as much as digits as its factorization.

16543061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11190.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 16543061 is about 4067.3161912986. The cubic root of 16543061 is about 254.8034420187.

The spelling of 16543061 in words is "sixteen million, five hundred forty-three thousand, sixty-one".