881565 has 8 divisors (see below), whose sum is σ = 1410528. Its totient is φ = 470160.

The previous prime is 881539. The next prime is 881591. The reversal of 881565 is 565188.

881565 = 51² + 52² + ... + 140².

It is an interprime number because it is at equal distance from previous prime (881539) and next prime (881591).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 881565 - 2⁵ = 881533 is a prime.

It is a super-3 number, since 3×881565³ = 2055342833361111375, which contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29371 + ... + 29400.

It is an arithmetic number, because the mean of its divisors is an integer number (176316).

2⁸⁸¹⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

881565 is a deficient number, since it is larger than the sum of its proper divisors (528963).

881565 is a wasteful number, since it uses less digits than its factorization.

881565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58779.

The product of its digits is 9600, while the sum is 33.

The square root of 881565 is about 938.9169292328. The cubic root of 881565 is about 95.8851708631.

It can be divided in two parts, 88 and 1565, that added together give a triangular number (1653 = T₅₇).

The spelling of 881565 in words is "eight hundred eighty-one thousand, five hundred sixty-five".