8261891 has 8 divisors (see below), whose sum is σ = 9223104. Its totient is φ = 7335720.

The previous prime is 8261879. The next prime is 8261893. The reversal of 8261891 is 1981628.

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 8261891 - 2¹⁴ = 8245507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8261893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8261 + ... + 9206.

It is an arithmetic number, because the mean of its divisors is an integer number (1152888).

Almost surely, 2^8261891 is an apocalyptic number.

8261891 is a deficient number, since it is larger than the sum of its proper divisors (961213).

8261891 is a wasteful number, since it uses less digits than its factorization.

8261891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17521.

The product of its digits is 6912, while the sum is 35.

The square root of 8261891 is about 2874.3505353384. The cubic root of 8261891 is about 202.1590339929.

The spelling of 8261891 in words is "eight million, two hundred sixty-one thousand, eight hundred ninety-one".