881865 has 12 divisors (see below), whose sum is σ = 1528644. Its totient is φ = 470304.

The previous prime is 881849. The next prime is 881897. The reversal of 881865 is 568188.

It can be written as a sum of positive squares in 2 ways, for example, as 328329 + 553536 = 573^2 + 744^2 .

It is not a de Polignac number, because 881865 - 2⁴ = 881849 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9754 + ... + 9843.

It is an arithmetic number, because the mean of its divisors is an integer number (127387).

2⁸⁸¹⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

881865 is a deficient number, since it is larger than the sum of its proper divisors (646779).

881865 is a wasteful number, since it uses less digits than its factorization.

881865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19608 (or 19605 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 881865 is about 939.0766741859. The cubic root of 881865 is about 95.8960463285.

It can be divided in two parts, 88 and 1865, that added together give a triangular number (1953 = T₆₂).

The spelling of 881865 in words is "eight hundred eighty-one thousand, eight hundred sixty-five".