9881225 has 12 divisors (see below), whose sum is σ = 12393180. Its totient is φ = 7814400.

The previous prime is 9881203. The next prime is 9881231. The reversal of 9881225 is 5221889.

It can be written as a sum of positive squares in 6 ways, for example, as 1261129 + 8620096 = 1123^2 + 2936^2 .

It is not a de Polignac number, because 9881225 - 2¹⁰ = 9880201 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 5 + ... + 4445.

It is an arithmetic number, because the mean of its divisors is an integer number (1032765).

Almost surely, 2^9881225 is an apocalyptic number.

It is an amenable number.

9881225 is a deficient number, since it is larger than the sum of its proper divisors (2511955).

9881225 is a wasteful number, since it uses less digits than its factorization.

9881225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4540 (or 4535 counting only the distinct ones).

The product of its digits is 11520, while the sum is 35.

The square root of 9881225 is about 3143.4415852692. The cubic root of 9881225 is about 214.5870928636.

The spelling of 9881225 in words is "nine million, eight hundred eighty-one thousand, two hundred twenty-five".