16671541 has 4 divisors (see below), whose sum is σ = 16679872. Its totient is φ = 16663212.

The previous prime is 16671539. The next prime is 16671547. The reversal of 16671541 is 14517661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16671541 - 2¹ = 16671539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16671547) 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, 850 + ... + 5836.

It is an arithmetic number, because the mean of its divisors is an integer number (4169968).

Almost surely, 2^16671541 is an apocalyptic number.

It is an amenable number.

16671541 is a deficient number, since it is larger than the sum of its proper divisors (8331).

16671541 is an equidigital number, since it uses as much as digits as its factorization.

16671541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8330.

The product of its digits is 5040, while the sum is 31.

The square root of 16671541 is about 4083.0798424719. The cubic root of 16671541 is about 255.4613766881.

The spelling of 16671541 in words is "sixteen million, six hundred seventy-one thousand, five hundred forty-one".