1303513 has 4 divisors (see below), whose sum is σ = 1335348. Its totient is φ = 1271680.

The previous prime is 1303507. The next prime is 1303517. The reversal of 1303513 is 3153031.

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 451584 + 851929 = 672^2 + 923^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303513 - 2⁵ = 1303481 is a prime.

It is a super-2 number, since 2×1303513² = 3398292282338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1303517) 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, 15856 + ... + 15937.

It is an arithmetic number, because the mean of its divisors is an integer number (333837).

2^1303513 is an apocalyptic number.

It is an amenable number.

1303513 is a deficient number, since it is larger than the sum of its proper divisors (31835).

1303513 is an equidigital number, since it uses as much as digits as its factorization.

1303513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31834.

The product of its (nonzero) digits is 135, while the sum is 16.

The square root of 1303513 is about 1141.7149381523. The cubic root of 1303513 is about 109.2375091976.

Adding to 1303513 its reverse (3153031), we get a palindrome (4456544).

The spelling of 1303513 in words is "one million, three hundred three thousand, five hundred thirteen".