7981085 has 16 divisors (see below), whose sum is σ = 11243136. Its totient is φ = 5323968.

The previous prime is 7981067. The next prime is 7981087. The reversal of 7981085 is 5801897.

It is a cyclic number.

It is not a de Polignac number, because 7981085 - 2⁶ = 7981021 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7981087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1787 + ... + 4376.

It is an arithmetic number, because the mean of its divisors is an integer number (702696).

Almost surely, 2^7981085 is an apocalyptic number.

It is an amenable number.

7981085 is a deficient number, since it is larger than the sum of its proper divisors (3262051).

7981085 is a wasteful number, since it uses less digits than its factorization.

7981085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6212.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 7981085 is about 2825.0814147560. The cubic root of 7981085 is about 199.8422506084.

The spelling of 7981085 in words is "seven million, nine hundred eighty-one thousand, eighty-five".