7321005 has 24 divisors (see below), whose sum is σ = 13035672. Its totient is φ = 3798144.

The previous prime is 7321003. The next prime is 7321007. The reversal of 7321005 is 5001237.

It is an interprime number because it is at equal distance from previous prime (7321003) and next prime (7321007).

It can be written as a sum of positive squares in 4 ways, for example, as 1929321 + 5391684 = 1389^2 + 2322^2 .

It is not a de Polignac number, because 7321005 - 2¹ = 7321003 is a prime.

It is a super-2 number, since 2×7321005² = 107194228420050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7321003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 534 + ... + 3863.

It is an arithmetic number, because the mean of its divisors is an integer number (543153).

Almost surely, 2^7321005 is an apocalyptic number.

It is an amenable number.

7321005 is a deficient number, since it is larger than the sum of its proper divisors (5714667).

7321005 is a wasteful number, since it uses less digits than its factorization.

7321005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4445 (or 4442 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 7321005 is about 2705.7355746636. The cubic root of 7321005 is about 194.1736232186.

The spelling of 7321005 in words is "seven million, three hundred twenty-one thousand, five".