8081261 has 4 divisors (see below), whose sum is σ = 8132892. Its totient is φ = 8029632.

The previous prime is 8081237. The next prime is 8081263. The reversal of 8081261 is 1621808.

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 1705636 + 6375625 = 1306^2 + 2525^2 .

It is a cyclic number.

It is not a de Polignac number, because 8081261 - 2⁶ = 8081197 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8081261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8081263) 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, 25580 + ... + 25893.

It is an arithmetic number, because the mean of its divisors is an integer number (2033223).

Almost surely, 2^8081261 is an apocalyptic number.

It is an amenable number.

8081261 is a deficient number, since it is larger than the sum of its proper divisors (51631).

8081261 is a wasteful number, since it uses less digits than its factorization.

8081261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51630.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 8081261 is about 2842.7558811829. The cubic root of 8081261 is about 200.6748950219.

The spelling of 8081261 in words is "eight million, eighty-one thousand, two hundred sixty-one".