7513321 has 2 divisors, whose sum is σ = 7513322. Its totient is φ = 7513320.

The previous prime is 7513283. The next prime is 7513327. The reversal of 7513321 is 1233157.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7398400 + 114921 = 2720^2 + 339^2 .

It is a cyclic number.

It is not a de Polignac number, because 7513321 - 2¹³ = 7505129 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7513292 and 7513301.

It is not a weakly prime, because it can be changed into another prime (7513327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3756660 + 3756661.

It is an arithmetic number, because the mean of its divisors is an integer number (3756661).

Almost surely, 2^7513321 is an apocalyptic number.

It is an amenable number.

7513321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7513321 is an equidigital number, since it uses as much as digits as its factorization.

7513321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 630, while the sum is 22.

The square root of 7513321 is about 2741.0437792928. The cubic root of 7513321 is about 195.8592022966.

Adding to 7513321 its reverse (1233157), we get a palindrome (8746478).

The spelling of 7513321 in words is "seven million, five hundred thirteen thousand, three hundred twenty-one".