9881205 has 16 divisors (see below), whose sum is σ = 16196544. Its totient is φ = 5141120.

The previous prime is 9881203. The next prime is 9881231. The reversal of 9881205 is 5021889.

It is a happy number.

It is not a de Polignac number, because 9881205 - 2¹ = 9881203 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

9881205 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9881203) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7419 + ... + 8648.

It is an arithmetic number, because the mean of its divisors is an integer number (1012284).

Almost surely, 2^9881205 is an apocalyptic number.

It is an amenable number.

9881205 is a deficient number, since it is larger than the sum of its proper divisors (6315339).

9881205 is a wasteful number, since it uses less digits than its factorization.

9881205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16116.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 9881205 is about 3143.4384040410. The cubic root of 9881205 is about 214.5869480859.

The spelling of 9881205 in words is "nine million, eight hundred eighty-one thousand, two hundred five".