1306513 has 4 divisors (see below), whose sum is σ = 1407028. Its totient is φ = 1206000.

The previous prime is 1306499. The next prime is 1306517. The reversal of 1306513 is 3156031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 199809 + 1106704 = 447^2 + 1052^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306513 - 2⁹ = 1306001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1306517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50238 + ... + 50263.

It is an arithmetic number, because the mean of its divisors is an integer number (351757).

2^1306513 is an apocalyptic number.

1306513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1306513 is a deficient number, since it is larger than the sum of its proper divisors (100515).

1306513 is a wasteful number, since it uses less digits than its factorization.

1306513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100514.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 1306513 is about 1143.0279961576. The cubic root of 1306513 is about 109.3212473834.

The spelling of 1306513 in words is "one million, three hundred six thousand, five hundred thirteen".