16085861 has 12 divisors (see below), whose sum is σ = 18164076. Its totient is φ = 14224320.

The previous prime is 16085843. The next prime is 16085873. The reversal of 16085861 is 16858061.

It can be written as a sum of positive squares in 2 ways, for example, as 10176100 + 5909761 = 3190^2 + 2431^2 .

It is not a de Polignac number, because 16085861 - 2¹⁴ = 16069477 is a prime.

It is a super-2 number, since 2×16085861² = 517509848222642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16085261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2681 + ... + 6273.

It is an arithmetic number, because the mean of its divisors is an integer number (1513673).

Almost surely, 2^16085861 is an apocalyptic number.

16085861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16085861 is a deficient number, since it is larger than the sum of its proper divisors (2078215).

16085861 is a wasteful number, since it uses less digits than its factorization.

16085861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3652 (or 3641 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 16085861 is about 4010.7182648498. The cubic root of 16085861 is about 252.4341481053.

The spelling of 16085861 in words is "sixteen million, eighty-five thousand, eight hundred sixty-one".