1513321 has 2 divisors, whose sum is σ = 1513322. Its totient is φ = 1513320.

The previous prime is 1513319. The next prime is 1513361. The reversal of 1513321 is 1233151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1166400 + 346921 = 1080^2 + 589^2 .

It is a cyclic number.

It is not a de Polignac number, because 1513321 - 2¹ = 1513319 is a prime.

Together with 1513319, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1513295 and 1513304.

It is not a weakly prime, because it can be changed into another prime (1513361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756660 + 756661.

It is an arithmetic number, because the mean of its divisors is an integer number (756661).

2^1513321 is an apocalyptic number.

It is an amenable number.

1513321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1513321 is an equidigital number, since it uses as much as digits as its factorization.

1513321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90, while the sum is 16.

The square root of 1513321 is about 1230.1711263072. The cubic root of 1513321 is about 114.8092869257.

Adding to 1513321 its reverse (1233151), we get a palindrome (2746472).

The spelling of 1513321 in words is "one million, five hundred thirteen thousand, three hundred twenty-one".