16082721 has 24 divisors (see below), whose sum is σ = 24645920. Its totient is φ = 10077696.

The previous prime is 16082719. The next prime is 16082761. The reversal of 16082721 is 12728061.

It is not a de Polignac number, because 16082721 - 2¹ = 16082719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16082761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27585 + ... + 28161.

Almost surely, 2^16082721 is an apocalyptic number.

It is an amenable number.

16082721 is a deficient number, since it is larger than the sum of its proper divisors (8563199).

16082721 is a wasteful number, since it uses less digits than its factorization.

16082721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 762 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 16082721 is about 4010.3267946640. The cubic root of 16082721 is about 252.4177217789.

The spelling of 16082721 in words is "sixteen million, eighty-two thousand, seven hundred twenty-one".