8261005 has 8 divisors (see below), whose sum is σ = 10015992. Its totient is φ = 6540288.

The previous prime is 8260999. The next prime is 8261017. The reversal of 8261005 is 5001628.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 184041 + 8076964 = 429^2 + 2842^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 8261005 - 2⁹ = 8260493 is a prime.

It is a super-2 number, since 2×8261005² = 136488407220050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8032 + ... + 9001.

It is an arithmetic number, because the mean of its divisors is an integer number (1251999).

Almost surely, 2^8261005 is an apocalyptic number.

It is an amenable number.

8261005 is a deficient number, since it is larger than the sum of its proper divisors (1754987).

8261005 is a wasteful number, since it uses less digits than its factorization.

8261005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17135.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 8261005 is about 2874.1964094334. The cubic root of 8261005 is about 202.1518072653.

The spelling of 8261005 in words is "eight million, two hundred sixty-one thousand, five".