8091261 has 18 divisors (see below), whose sum is σ = 12115610. Its totient is φ = 5203296.

The previous prime is 8091241. The next prime is 8091277. The reversal of 8091261 is 1621908.

It can be written as a sum of positive squares in 3 ways, for example, as 1232100 + 6859161 = 1110^2 + 2619^2 .

It is not a de Polignac number, because 8091261 - 2⁹ = 8090749 is a prime.

It is a Duffinian number.

8091261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8091221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7035 + ... + 8103.

Almost surely, 2^8091261 is an apocalyptic number.

It is an amenable number.

8091261 is a deficient number, since it is larger than the sum of its proper divisors (4024349).

8091261 is a wasteful number, since it uses less digits than its factorization.

8091261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133 (or 1101 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 8091261 is about 2844.5141940233. The cubic root of 8091261 is about 200.7576346579.

The spelling of 8091261 in words is "eight million, ninety-one thousand, two hundred sixty-one".