7320645 has 32 divisors (see below), whose sum is σ = 13127040. Its totient is φ = 3870720.

The previous prime is 7320637. The next prime is 7320653. The reversal of 7320645 is 5460237.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7320637) and next prime (7320653).

It is not a de Polignac number, because 7320645 - 2³ = 7320637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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, 28357 + ... + 28613.

It is an arithmetic number, because the mean of its divisors is an integer number (410220).

Almost surely, 2^7320645 is an apocalyptic number.

It is an amenable number.

7320645 is a deficient number, since it is larger than the sum of its proper divisors (5806395).

7320645 is a wasteful number, since it uses less digits than its factorization.

7320645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 7320645 is about 2705.6690484980. The cubic root of 7320645 is about 194.1704404292.

The spelling of 7320645 in words is "seven million, three hundred twenty thousand, six hundred forty-five".