1302813 has 6 divisors (see below), whose sum is σ = 1881854. Its totient is φ = 868536.

The previous prime is 1302803. The next prime is 1302827. The reversal of 1302813 is 3182031.

It can be written as a sum of positive squares in only one way, i.e., 1159929 + 142884 = 1077^2 + 378^2 .

It is not a de Polignac number, because 1302813 - 2¹³ = 1294621 is a prime.

It is a Duffinian number.

It is a Curzon number.

1302813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72370 + ... + 72387.

2^1302813 is an apocalyptic number.

It is an amenable number.

1302813 is a deficient number, since it is larger than the sum of its proper divisors (579041).

1302813 is a wasteful number, since it uses less digits than its factorization.

1302813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144763 (or 144760 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1302813 is about 1141.4083406038. The cubic root of 1302813 is about 109.2179518045.

Adding to 1302813 its reverse (3182031), we get a palindrome (4484844).

It can be divided in two parts, 13028 and 13, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 1302813 in words is "one million, three hundred two thousand, eight hundred thirteen".