7320641 has 4 divisors (see below), whose sum is σ = 7330500. Its totient is φ = 7310784.

The previous prime is 7320637. The next prime is 7320653. The reversal of 7320641 is 1460237.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6270016 + 1050625 = 2504^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 7320641 - 2² = 7320637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7320041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3716 + ... + 5333.

It is an arithmetic number, because the mean of its divisors is an integer number (1832625).

Almost surely, 2^7320641 is an apocalyptic number.

It is an amenable number.

7320641 is a deficient number, since it is larger than the sum of its proper divisors (9859).

7320641 is an equidigital number, since it uses as much as digits as its factorization.

7320641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9858.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 7320641 is about 2705.6683093092. The cubic root of 7320641 is about 194.1704050643.

Adding to 7320641 its reverse (1460237), we get a palindrome (8780878).

The spelling of 7320641 in words is "seven million, three hundred twenty thousand, six hundred forty-one".