13002001 has 4 divisors (see below), whose sum is σ = 13011172. Its totient is φ = 12992832.

The previous prime is 13001993. The next prime is 13002019. The reversal of 13002001 is 10020031.

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 2 ways, for example, as 4730625 + 8271376 = 2175^2 + 2876^2 .

It is a cyclic number.

It is not a de Polignac number, because 13002001 - 2³ = 13001993 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13002071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1956 + ... + 5461.

It is an arithmetic number, because the mean of its divisors is an integer number (3252793).

Almost surely, 2^13002001 is an apocalyptic number.

It is an amenable number.

13002001 is a deficient number, since it is larger than the sum of its proper divisors (9171).

13002001 is an equidigital number, since it uses as much as digits as its factorization.

13002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9170.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 13002001 is about 3605.8287535600. The cubic root of 13002001 is about 235.1455323088.

Adding to 13002001 its reverse (10020031), we get a palindrome (23022032).

The spelling of 13002001 in words is "thirteen million, two thousand, one".