7321985 has 32 divisors (see below), whose sum is σ = 10450944. Its totient is φ = 4864000.

The previous prime is 7321969. The next prime is 7321987. The reversal of 7321985 is 5891237.

It is not a de Polignac number, because 7321985 - 2⁴ = 7321969 is a prime.

It is a super-2 number, since 2×7321985² = 107222928680450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7321987) 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, 38240 + ... + 38430.

It is an arithmetic number, because the mean of its divisors is an integer number (326592).

Almost surely, 2^7321985 is an apocalyptic number.

It is an amenable number.

7321985 is a deficient number, since it is larger than the sum of its proper divisors (3128959).

7321985 is a wasteful number, since it uses less digits than its factorization.

7321985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265.

The product of its digits is 15120, while the sum is 35.

The square root of 7321985 is about 2705.9166653835. The cubic root of 7321985 is about 194.1822869499.

The spelling of 7321985 in words is "seven million, three hundred twenty-one thousand, nine hundred eighty-five".