9881565 has 16 divisors (see below), whose sum is σ = 16003008. Its totient is φ = 5206016.

The previous prime is 9881561. The next prime is 9881569. The reversal of 9881565 is 5651889.

It is an interprime number because it is at equal distance from previous prime (9881561) and next prime (9881569).

It is a cyclic number.

It is not a de Polignac number, because 9881565 - 2² = 9881561 is a prime.

It is a Curzon number.

9881565 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9881561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2724 + ... + 5213.

It is an arithmetic number, because the mean of its divisors is an integer number (1000188).

Almost surely, 2^9881565 is an apocalyptic number.

It is an amenable number.

9881565 is a deficient number, since it is larger than the sum of its proper divisors (6121443).

9881565 is a wasteful number, since it uses less digits than its factorization.

9881565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8028.

The product of its digits is 86400, while the sum is 42.

The square root of 9881565 is about 3143.4956656563. The cubic root of 9881565 is about 214.5895540556.

The spelling of 9881565 in words is "nine million, eight hundred eighty-one thousand, five hundred sixty-five".