7221746 has 8 divisors (see below), whose sum is σ = 12380160. Its totient is φ = 3095028.

The previous prime is 7221743. The next prime is 7221749. The reversal of 7221746 is 6471227.

It is an interprime number because it is at equal distance from previous prime (7221743) and next prime (7221749).

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7221743) 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, 257906 + ... + 257933.

It is an arithmetic number, because the mean of its divisors is an integer number (1547520).

Almost surely, 2^7221746 is an apocalyptic number.

7221746 is a deficient number, since it is larger than the sum of its proper divisors (5158414).

7221746 is a wasteful number, since it uses less digits than its factorization.

7221746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515848.

The product of its digits is 4704, while the sum is 29.

The square root of 7221746 is about 2687.3306458268. The cubic root of 7221746 is about 193.2920846073.

The spelling of 7221746 in words is "seven million, two hundred twenty-one thousand, seven hundred forty-six".