7224385 has 8 divisors (see below), whose sum is σ = 9907776. Its totient is φ = 4953840.

The previous prime is 7224379. The next prime is 7224391. The reversal of 7224385 is 5834227.

It is an interprime number because it is at equal distance from previous prime (7224379) and next prime (7224391).

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

It is not a de Polignac number, because 7224385 - 2¹³ = 7216193 is a prime.

It is a Duffinian number.

7224385 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103171 + ... + 103240.

It is an arithmetic number, because the mean of its divisors is an integer number (1238472).

Almost surely, 2^7224385 is an apocalyptic number.

It is an amenable number.

7224385 is a deficient number, since it is larger than the sum of its proper divisors (2683391).

7224385 is a wasteful number, since it uses less digits than its factorization.

7224385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206423.

The product of its digits is 13440, while the sum is 31.

The square root of 7224385 is about 2687.8216086638. The cubic root of 7224385 is about 193.3156262684.

The spelling of 7224385 in words is "seven million, two hundred twenty-four thousand, three hundred eighty-five".