8261865 has 32 divisors (see below), whose sum is σ = 15465600. Its totient is φ = 4173120.

The previous prime is 8261857. The next prime is 8261879. The reversal of 8261865 is 5681628.

It is a happy number.

8261865 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8261865 - 2³ = 8261857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 955 + ... + 4175.

It is an arithmetic number, because the mean of its divisors is an integer number (483300).

Almost surely, 2^8261865 is an apocalyptic number.

It is an amenable number.

8261865 is a deficient number, since it is larger than the sum of its proper divisors (7203735).

8261865 is a wasteful number, since it uses less digits than its factorization.

8261865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3254 (or 3248 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 8261865 is about 2874.3460125740. The cubic root of 8261865 is about 202.1588219293.

The spelling of 8261865 in words is "eight million, two hundred sixty-one thousand, eight hundred sixty-five".