16884121 has 4 divisors (see below), whose sum is σ = 17033652. Its totient is φ = 16734592.

The previous prime is 16884107. The next prime is 16884137. The reversal of 16884121 is 12148861.

16884121 = T₂₆₈ + T₂₆₉ + ... + T₄₉₃.

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 6250000 + 10634121 = 2500^2 + 3261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16884121 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16884151) 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, 74596 + ... + 74821.

It is an arithmetic number, because the mean of its divisors is an integer number (4258413).

Almost surely, 2^16884121 is an apocalyptic number.

It is an amenable number.

16884121 is a deficient number, since it is larger than the sum of its proper divisors (149531).

16884121 is a wasteful number, since it uses less digits than its factorization.

16884121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149530.

The product of its digits is 3072, while the sum is 31.

The square root of 16884121 is about 4109.0292040822. The cubic root of 16884121 is about 256.5425960946.

The spelling of 16884121 in words is "sixteen million, eight hundred eighty-four thousand, one hundred twenty-one".