881065 has 4 divisors (see below), whose sum is σ = 1057284. Its totient is φ = 704848.

The previous prime is 881057. The next prime is 881071. The reversal of 881065 is 560188.

It is a happy number.

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 197136 + 683929 = 444^2 + 827^2 .

It is a cyclic number.

It is not a de Polignac number, because 881065 - 2³ = 881057 is a prime.

It is an Ulam number.

It is a Duffinian number.

881065 is a lucky number.

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 3 ways as a sum of consecutive naturals, for example, 88102 + ... + 88111.

It is an arithmetic number, because the mean of its divisors is an integer number (264321).

2⁸⁸¹⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

881065 is a deficient number, since it is larger than the sum of its proper divisors (176219).

881065 is a wasteful number, since it uses less digits than its factorization.

881065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176218.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 881065 is about 938.6506272304. The cubic root of 881065 is about 95.8670396033.

The spelling of 881065 in words is "eight hundred eighty-one thousand, sixty-five".