7281985 has 8 divisors (see below), whose sum is σ = 8755776. Its totient is φ = 5814000.

The previous prime is 7281977. The next prime is 7282003. The reversal of 7281985 is 5891827.

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

It is not a de Polignac number, because 7281985 - 2³ = 7281977 is a prime.

It is a Duffinian number.

7281985 is a lucky 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, 2110 + ... + 4360.

It is an arithmetic number, because the mean of its divisors is an integer number (1094472).

Almost surely, 2^7281985 is an apocalyptic number.

It is an amenable number.

7281985 is a deficient number, since it is larger than the sum of its proper divisors (1473791).

7281985 is a wasteful number, since it uses less digits than its factorization.

7281985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2903.

The product of its digits is 40320, while the sum is 40.

The square root of 7281985 is about 2698.5153325486. The cubic root of 7281985 is about 193.8280351635.

The spelling of 7281985 in words is "seven million, two hundred eighty-one thousand, nine hundred eighty-five".