16856065 has 8 divisors (see below), whose sum is σ = 20504808. Its totient is φ = 13299840.

The previous prime is 16856051. The next prime is 16856071. The reversal of 16856065 is 56065861.

16856065 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in 4 ways, for example, as 4068289 + 12787776 = 2017^2 + 3576^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16856065 - 2¹⁷ = 16724993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22726 + ... + 23455.

It is an arithmetic number, because the mean of its divisors is an integer number (2563101).

Almost surely, 2^16856065 is an apocalyptic number.

It is an amenable number.

16856065 is a deficient number, since it is larger than the sum of its proper divisors (3648743).

16856065 is an equidigital number, since it uses as much as digits as its factorization.

16856065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46259.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 16856065 is about 4105.6138396103. The cubic root of 16856065 is about 256.4004201128.

It can be divided in two parts, 1685 and 6065, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 16856065 in words is "sixteen million, eight hundred fifty-six thousand, sixty-five".