7380721 has 4 divisors (see below), whose sum is σ = 7769200. Its totient is φ = 6992244.

The previous prime is 7380719. The next prime is 7380731. The reversal of 7380721 is 1270837.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1270837 = 811 ⋅1567.

It is a cyclic number.

It is not a de Polignac number, because 7380721 - 2¹ = 7380719 is a prime.

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 7380721.

It is not an unprimeable number, because it can be changed into a prime (7380701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194211 + ... + 194248.

It is an arithmetic number, because the mean of its divisors is an integer number (1942300).

Almost surely, 2^7380721 is an apocalyptic number.

It is an amenable number.

7380721 is a deficient number, since it is larger than the sum of its proper divisors (388479).

7380721 is a wasteful number, since it uses less digits than its factorization.

7380721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388478.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 7380721 is about 2716.7482400841. The cubic root of 7380721 is about 194.7001396095.

The spelling of 7380721 in words is "seven million, three hundred eighty thousand, seven hundred twenty-one".