1002813 has 24 divisors (see below), whose sum is σ = 1649088. Its totient is φ = 529152.

The previous prime is 1002809. The next prime is 1002817. The reversal of 1002813 is 3182001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1002809) and next prime (1002817).

It is not a de Polignac number, because 1002813 - 2² = 1002809 is a prime.

1002813 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1002792 and 1002801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002817) 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 23 ways as a sum of consecutive naturals, for example, 18895 + ... + 18947.

It is an arithmetic number, because the mean of its divisors is an integer number (68712).

2^1002813 is an apocalyptic number.

It is an amenable number.

1002813 is a deficient number, since it is larger than the sum of its proper divisors (646275).

1002813 is an equidigital number, since it uses as much as digits as its factorization.

1002813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1002813 is about 1001.4055122676. The cubic root of 1002813 is about 100.0936788819.

Adding to 1002813 its reverse (3182001), we get a palindrome (4184814).

The spelling of 1002813 in words is "one million, two thousand, eight hundred thirteen".