7224645 has 32 divisors (see below), whose sum is σ = 12367872. Its totient is φ = 3592512.

The previous prime is 7224641. The next prime is 7224647. The reversal of 7224645 is 5464227.

It is not a de Polignac number, because 7224645 - 2² = 7224641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7224641) 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 31 ways as a sum of consecutive naturals, for example, 14592 + ... + 15078.

It is an arithmetic number, because the mean of its divisors is an integer number (386496).

Almost surely, 2^7224645 is an apocalyptic number.

It is an amenable number.

7224645 is a deficient number, since it is larger than the sum of its proper divisors (5143227).

7224645 is a wasteful number, since it uses less digits than its factorization.

7224645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561.

The product of its digits is 13440, while the sum is 30.

The square root of 7224645 is about 2687.8699745337. The cubic root of 7224645 is about 193.3179453336.

The spelling of 7224645 in words is "seven million, two hundred twenty-four thousand, six hundred forty-five".