16285861 has 2 divisors, whose sum is σ = 16285862. Its totient is φ = 16285860.

The previous prime is 16285859. The next prime is 16285873. The reversal of 16285861 is 16858261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15752961 + 532900 = 3969^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 16285861 - 2¹ = 16285859 is a prime.

It is a super-2 number, since 2×16285861² = 530458537022642, which contains 22 as substring.

Together with 16285859, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16285861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16285811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8142930 + 8142931.

It is an arithmetic number, because the mean of its divisors is an integer number (8142931).

Almost surely, 2^16285861 is an apocalyptic number.

It is an amenable number.

16285861 is a deficient number, since it is larger than the sum of its proper divisors (1).

16285861 is an equidigital number, since it uses as much as digits as its factorization.

16285861 is an evil number, because the sum of its binary digits is even.

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

The square root of 16285861 is about 4035.5744324693. The cubic root of 16285861 is about 253.4760366742.

The spelling of 16285861 in words is "sixteen million, two hundred eighty-five thousand, eight hundred sixty-one".