7321445 has 4 divisors (see below), whose sum is σ = 8785740. Its totient is φ = 5857152.

The previous prime is 7321439. The next prime is 7321451. The reversal of 7321445 is 5441237.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5441237 = 47 ⋅115771.

It is an interprime number because it is at equal distance from previous prime (7321439) and next prime (7321451).

It can be written as a sum of positive squares in 2 ways, for example, as 4056196 + 3265249 = 2014^2 + 1807^2 .

It is a cyclic number.

It is not a de Polignac number, because 7321445 - 2⁸ = 7321189 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732140 + ... + 732149.

It is an arithmetic number, because the mean of its divisors is an integer number (2196435).

Almost surely, 2^7321445 is an apocalyptic number.

It is an amenable number.

7321445 is a deficient number, since it is larger than the sum of its proper divisors (1464295).

7321445 is a wasteful number, since it uses less digits than its factorization.

7321445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464294.

The product of its digits is 3360, while the sum is 26.

The square root of 7321445 is about 2705.8168822003. The cubic root of 7321445 is about 194.1775131528.

The spelling of 7321445 in words is "seven million, three hundred twenty-one thousand, four hundred forty-five".