7230921 has 8 divisors (see below), whose sum is σ = 9658080. Its totient is φ = 4812192.

The previous prime is 7230911. The next prime is 7230929. The reversal of 7230921 is 1290327.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7230921 - 2⁶ = 7230857 is a prime.

It is an Ulam number.

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

It is a junction number, because it is equal to n+sod(n) for n = 7230891 and 7230900.

It is not an unprimeable number, because it can be changed into a prime (7230929) 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 7 ways as a sum of consecutive naturals, for example, 285 + ... + 3813.

It is an arithmetic number, because the mean of its divisors is an integer number (1207260).

Almost surely, 2^7230921 is an apocalyptic number.

It is an amenable number.

7230921 is a deficient number, since it is larger than the sum of its proper divisors (2427159).

7230921 is a wasteful number, since it uses less digits than its factorization.

7230921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4215.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 7230921 is about 2689.0371882888. The cubic root of 7230921 is about 193.3739071272.

The spelling of 7230921 in words is "seven million, two hundred thirty thousand, nine hundred twenty-one".