7672321 has 4 divisors (see below), whose sum is σ = 8123652. Its totient is φ = 7220992.

The previous prime is 7672319. The next prime is 7672337. The reversal of 7672321 is 1232767.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1232767 = 43 ⋅28669.

It can be written as a sum of positive squares in 2 ways, for example, as 2359296 + 5313025 = 1536^2 + 2305^2 .

It is a cyclic number.

It is not a de Polignac number, because 7672321 - 2¹ = 7672319 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7672321.

It is not an unprimeable number, because it can be changed into a prime (7672391) 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, 225640 + ... + 225673.

It is an arithmetic number, because the mean of its divisors is an integer number (2030913).

Almost surely, 2^7672321 is an apocalyptic number.

It is an amenable number.

7672321 is a deficient number, since it is larger than the sum of its proper divisors (451331).

7672321 is a wasteful number, since it uses less digits than its factorization.

7672321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451330.

The product of its digits is 3528, while the sum is 28.

The square root of 7672321 is about 2769.8954853929. The cubic root of 7672321 is about 197.2311869260.

The spelling of 7672321 in words is "seven million, six hundred seventy-two thousand, three hundred twenty-one".