16506841 has 4 divisors (see below), whose sum is σ = 17776612. Its totient is φ = 15237072.

The previous prime is 16506821. The next prime is 16506859. The reversal of 16506841 is 14860561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14860561 = 1151 ⋅12911.

It can be written as a sum of positive squares in 2 ways, for example, as 6451600 + 10055241 = 2540^2 + 3171^2 .

It is a cyclic number.

It is not a de Polignac number, because 16506841 - 2²³ = 8118233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16506811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634866 + ... + 634891.

It is an arithmetic number, because the mean of its divisors is an integer number (4444153).

Almost surely, 2^16506841 is an apocalyptic number.

It is an amenable number.

16506841 is a deficient number, since it is larger than the sum of its proper divisors (1269771).

16506841 is a wasteful number, since it uses less digits than its factorization.

16506841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269770.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 16506841 is about 4062.8611839441. The cubic root of 16506841 is about 254.6173473916.

The spelling of 16506841 in words is "sixteen million, five hundred six thousand, eight hundred forty-one".