7321541 has 2 divisors, whose sum is σ = 7321542. Its totient is φ = 7321540.

The previous prime is 7321529. The next prime is 7321583. The reversal of 7321541 is 1451237.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4532641 + 2788900 = 2129^2 + 1670^2 .

It is an emirp because it is prime and its reverse (1451237) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7321541 - 2²² = 3127237 is a prime.

It is a super-2 number, since 2×7321541² = 107209925229362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7321241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3660770 + 3660771.

It is an arithmetic number, because the mean of its divisors is an integer number (3660771).

Almost surely, 2^7321541 is an apocalyptic number.

It is an amenable number.

7321541 is a deficient number, since it is larger than the sum of its proper divisors (1).

7321541 is an equidigital number, since it uses as much as digits as its factorization.

7321541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 23.

The square root of 7321541 is about 2705.8346217018. The cubic root of 7321541 is about 194.1783618450.

Adding to 7321541 its reverse (1451237), we get a palindrome (8772778).

The spelling of 7321541 in words is "seven million, three hundred twenty-one thousand, five hundred forty-one".