1320005013 has 16 divisors (see below), whose sum is σ = 1821188160. Its totient is φ = 849873024.

The previous prime is 1320004999. The next prime is 1320005033. The reversal of 1320005013 is 3105000231.

It is a happy number.

It is not a de Polignac number, because 1320005013 - 2¹⁰ = 1320003989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320004983 and 1320005001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320005033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46006 + ... + 68967.

It is an arithmetic number, because the mean of its divisors is an integer number (113824260).

Almost surely, 2^1320005013 is an apocalyptic number.

It is an amenable number.

1320005013 is a deficient number, since it is larger than the sum of its proper divisors (501183147).

1320005013 is a wasteful number, since it uses less digits than its factorization.

1320005013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115108.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1320005013 is about 36331.8732382463. The cubic root of 1320005013 is about 1096.9626991381.

Adding to 1320005013 its reverse (3105000231), we get a palindrome (4425005244).

The spelling of 1320005013 in words is "one billion, three hundred twenty million, five thousand, thirteen".