16072081 has 9 divisors (see below), whose sum is σ = 17043273. Its totient is φ = 15154020.

The previous prime is 16072051. The next prime is 16072093. The reversal of 16072081 is 18027061.

The square root of 16072081 is 4009.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 16072081 - 2⁹ = 16071569 is a prime.

It is a super-2 number, since 2×16072081² = 516623575341122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16072051) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 76066 + ... + 76276.

It is an arithmetic number, because the mean of its divisors is an integer number (1893697).

Almost surely, 2^16072081 is an apocalyptic number.

16072081 is the 4009-th square number.

16072081 is the 2005-th centered octagonal number.

It is an amenable number.

16072081 is a deficient number, since it is larger than the sum of its proper divisors (971192).

16072081 is an frugal number, since it uses more digits than its factorization.

16072081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The cubic root of 16072081 is about 252.3620446944.

Multiplying 16072081 by its sum of digits (25), we get a square (401802025 = 20045²).

It can be divided in two parts, 160720 and 81, that added together give a square (160801 = 401²).

The spelling of 16072081 in words is "sixteen million, seventy-two thousand, eighty-one".