1340513 has 4 divisors (see below), whose sum is σ = 1342980. Its totient is φ = 1338048.

The previous prime is 1340497. The next prime is 1340527. The reversal of 1340513 is 3150431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3150431 = 83 ⋅37957.

It can be written as a sum of positive squares in 2 ways, for example, as 833569 + 506944 = 913^2 + 712^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340513 - 2⁴ = 1340497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1340491 and 1340500.

It is not an unprimeable number, because it can be changed into a prime (1340113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20 + ... + 1637.

It is an arithmetic number, because the mean of its divisors is an integer number (335745).

2^1340513 is an apocalyptic number.

It is an amenable number.

1340513 is a deficient number, since it is larger than the sum of its proper divisors (2467).

1340513 is an equidigital number, since it uses as much as digits as its factorization.

1340513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2466.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1340513 is about 1157.8052513268. The cubic root of 1340513 is about 110.2614442317.

Adding to 1340513 its reverse (3150431), we get a palindrome (4490944).

The spelling of 1340513 in words is "one million, three hundred forty thousand, five hundred thirteen".