7322521 has 2 divisors, whose sum is σ = 7322522. Its totient is φ = 7322520.

The previous prime is 7322489. The next prime is 7322531. The reversal of 7322521 is 1252237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7096896 + 225625 = 2664^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 7322521 - 2⁵ = 7322489 is a prime.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 7322492 and 7322501.

It is not a weakly prime, because it can be changed into another prime (7322531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3661260 + 3661261.

It is an arithmetic number, because the mean of its divisors is an integer number (3661261).

Almost surely, 2^7322521 is an apocalyptic number.

It is an amenable number.

7322521 is a deficient number, since it is larger than the sum of its proper divisors (1).

7322521 is an equidigital number, since it uses as much as digits as its factorization.

7322521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 22.

The square root of 7322521 is about 2706.0157057933. The cubic root of 7322521 is about 194.1870251534.

Adding to 7322521 its reverse (1252237), we get a palindrome (8574758).

The spelling of 7322521 in words is "seven million, three hundred twenty-two thousand, five hundred twenty-one".