7321745 has 16 divisors (see below), whose sum is σ = 9503040. Its totient is φ = 5396544.

The previous prime is 7321729. The next prime is 7321753. The reversal of 7321745 is 5471237.

It is a cyclic number.

It is not a de Polignac number, because 7321745 - 2⁴ = 7321729 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 2474 + ... + 4556.

It is an arithmetic number, because the mean of its divisors is an integer number (593940).

Almost surely, 2^7321745 is an apocalyptic number.

It is an amenable number.

7321745 is a deficient number, since it is larger than the sum of its proper divisors (2181295).

7321745 is a wasteful number, since it uses less digits than its factorization.

7321745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144.

The product of its digits is 5880, while the sum is 29.

The square root of 7321745 is about 2705.8723177563. The cubic root of 7321745 is about 194.1801652912.

The spelling of 7321745 in words is "seven million, three hundred twenty-one thousand, seven hundred forty-five".