16885261 has 2 divisors, whose sum is σ = 16885262. Its totient is φ = 16885260.

The previous prime is 16885237. The next prime is 16885327. The reversal of 16885261 is 16258861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16048036 + 837225 = 4006^2 + 915^2 .

It is a cyclic number.

It is not a de Polignac number, because 16885261 - 2¹¹ = 16883213 is a prime.

It is a super-2 number, since 2×16885261² = 570224078076242, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16885261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16885201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8442630 + 8442631.

It is an arithmetic number, because the mean of its divisors is an integer number (8442631).

Almost surely, 2^16885261 is an apocalyptic number.

It is an amenable number.

16885261 is a deficient number, since it is larger than the sum of its proper divisors (1).

16885261 is an equidigital number, since it uses as much as digits as its factorization.

16885261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 37.

The square root of 16885261 is about 4109.1679206379. The cubic root of 16885261 is about 256.5483698031.

The spelling of 16885261 in words is "sixteen million, eight hundred eighty-five thousand, two hundred sixty-one".