7306921 has 4 divisors (see below), whose sum is σ = 7313152. Its totient is φ = 7300692.

The previous prime is 7306909. The next prime is 7306931. The reversal of 7306921 is 1296037.

7306921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7306921 - 2¹⁵ = 7274153 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 7306921.

It is not an unprimeable number, because it can be changed into a prime (7306931) 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, 765 + ... + 3898.

It is an arithmetic number, because the mean of its divisors is an integer number (1828288).

Almost surely, 2^7306921 is an apocalyptic number.

It is an amenable number.

7306921 is a deficient number, since it is larger than the sum of its proper divisors (6231).

7306921 is a wasteful number, since it uses less digits than its factorization.

7306921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6230.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 7306921 is about 2703.1317023038. The cubic root of 7306921 is about 194.0490275351.

The spelling of 7306921 in words is "seven million, three hundred six thousand, nine hundred twenty-one".