16842281 has 2 divisors, whose sum is σ = 16842282. Its totient is φ = 16842280.

The previous prime is 16842253. The next prime is 16842299. The reversal of 16842281 is 18224861.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16128256 + 714025 = 4016^2 + 845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16842281 is a prime.

It is a super-2 number, since 2×16842281² = 567324858565922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16842481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8421140 + 8421141.

It is an arithmetic number, because the mean of its divisors is an integer number (8421141).

Almost surely, 2^16842281 is an apocalyptic number.

It is an amenable number.

16842281 is a deficient number, since it is larger than the sum of its proper divisors (1).

16842281 is an equidigital number, since it uses as much as digits as its factorization.

16842281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 32.

The square root of 16842281 is about 4103.9348191705. The cubic root of 16842281 is about 256.3305108112.

The spelling of 16842281 in words is "sixteen million, eight hundred forty-two thousand, two hundred eighty-one".