7221265 has 8 divisors (see below), whose sum is σ = 8742888. Its totient is φ = 5725440.

The previous prime is 7221259. The next prime is 7221281. The reversal of 7221265 is 5621227.

It can be written as a sum of positive squares in 4 ways, for example, as 103041 + 7118224 = 321^2 + 2668^2 .

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

It is not a de Polignac number, because 7221265 - 2³ = 7221257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5826 + ... + 6955.

It is an arithmetic number, because the mean of its divisors is an integer number (1092861).

Almost surely, 2^7221265 is an apocalyptic number.

It is an amenable number.

7221265 is a deficient number, since it is larger than the sum of its proper divisors (1521623).

7221265 is a wasteful number, since it uses less digits than its factorization.

7221265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12899.

The product of its digits is 1680, while the sum is 25.

The square root of 7221265 is about 2687.2411503250. The cubic root of 7221265 is about 193.2877931448.

The spelling of 7221265 in words is "seven million, two hundred twenty-one thousand, two hundred sixty-five".