16086321 has 6 divisors (see below), whose sum is σ = 23235810. Its totient is φ = 10724208.

The previous prime is 16086319. The next prime is 16086337. The reversal of 16086321 is 12368061.

It can be written as a sum of positive squares in only one way, i.e., 13727025 + 2359296 = 3705^2 + 1536^2 .

It is not a de Polignac number, because 16086321 - 2¹ = 16086319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16086121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 893676 + ... + 893693.

It is an arithmetic number, because the mean of its divisors is an integer number (3872635).

Almost surely, 2^16086321 is an apocalyptic number.

It is an amenable number.

16086321 is a deficient number, since it is larger than the sum of its proper divisors (7149489).

16086321 is a wasteful number, since it uses less digits than its factorization.

16086321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787375 (or 1787372 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 16086321 is about 4010.7756107765. The cubic root of 16086321 is about 252.4365543302.

The spelling of 16086321 in words is "sixteen million, eighty-six thousand, three hundred twenty-one".