1320003001 has 4 divisors (see below), whose sum is σ = 1344908772. Its totient is φ = 1295097232.

The previous prime is 1320002987. The next prime is 1320003007. The reversal of 1320003001 is 1003000231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1003000231 = 139 ⋅7215829.

It can be written as a sum of positive squares in 2 ways, for example, as 975937600 + 344065401 = 31240^2 + 18549^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320003001 - 2¹⁵ = 1319970233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320003007) 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, 12452806 + ... + 12452911.

It is an arithmetic number, because the mean of its divisors is an integer number (336227193).

Almost surely, 2^1320003001 is an apocalyptic number.

It is an amenable number.

1320003001 is a deficient number, since it is larger than the sum of its proper divisors (24905771).

1320003001 is an equidigital number, since it uses as much as digits as its factorization.

1320003001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24905770.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 1320003001 is about 36331.8455490497. The cubic root of 1320003001 is about 1096.9621417942.

Adding to 1320003001 its reverse (1003000231), we get a palindrome (2323003232).

The spelling of 1320003001 in words is "one billion, three hundred twenty million, three thousand, one".