7318081 has 4 divisors (see below), whose sum is σ = 7456212. Its totient is φ = 7179952.

The previous prime is 7318067. The next prime is 7318093. The reversal of 7318081 is 1808137.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2005056 + 5313025 = 1416^2 + 2305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7318081 is a prime.

It is a super-2 number, since 2×7318081² = 107108619045122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7318061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68986 + ... + 69091.

It is an arithmetic number, because the mean of its divisors is an integer number (1864053).

Almost surely, 2^7318081 is an apocalyptic number.

It is an amenable number.

7318081 is a deficient number, since it is larger than the sum of its proper divisors (138131).

7318081 is a wasteful number, since it uses less digits than its factorization.

7318081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138130.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 7318081 is about 2705.1951870429. The cubic root of 7318081 is about 194.1477688776.

The spelling of 7318081 in words is "seven million, three hundred eighteen thousand, eighty-one".