16008001 has 3 divisors (see below), whose sum is σ = 16012003. Its totient is φ = 16004000.

The previous prime is 16007993. The next prime is 16008011. The reversal of 16008001 is 10080061.

The square root of 16008001 is 4001.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 641601 + 15366400 = 801^2 + 3920^2 .

It is not a de Polignac number, because 16008001 - 2³ = 16007993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16008011) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2001 + ... + 6001.

Almost surely, 2^16008001 is an apocalyptic number.

16008001 is the 4001-st square number.

16008001 is the 2001-st centered octagonal number.

It is an amenable number.

16008001 is a deficient number, since it is larger than the sum of its proper divisors (4002).

16008001 is an frugal number, since it uses more digits than its factorization.

16008001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8002 (or 4001 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The cubic root of 16008001 is about 252.0262055976.

Multiplying 16008001 by its sum of digits (16), we get a square (256128016 = 16004²).

Adding to 16008001 its reverse (10080061), we get a palindrome (26088062).

The spelling of 16008001 in words is "sixteen million, eight thousand, one".