881005 has 4 divisors (see below), whose sum is σ = 1057212. Its totient is φ = 704800.

The previous prime is 881003. The next prime is 881009. The reversal of 881005 is 500188.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 644809 = 486^2 + 803^2 .

It is not a de Polignac number, because 881005 - 2¹ = 881003 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (881003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88096 + ... + 88105.

It is an arithmetic number, because the mean of its divisors is an integer number (264303).

2⁸⁸¹⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

881005 is a deficient number, since it is larger than the sum of its proper divisors (176207).

881005 is a wasteful number, since it uses less digits than its factorization.

881005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176206.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 881005 is about 938.6186659128. The cubic root of 881005 is about 95.8648633912.

The spelling of 881005 in words is "eight hundred eighty-one thousand, five".