9881545 has 4 divisors (see below), whose sum is σ = 11857860. Its totient is φ = 7905232.

The previous prime is 9881527. The next prime is 9881551. The reversal of 9881545 is 5451889.

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 3059001 + 6822544 = 1749^2 + 2612^2 .

It is a cyclic number.

It is not a de Polignac number, because 9881545 - 2¹⁷ = 9750473 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 9881498 and 9881507.

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 3 ways as a sum of consecutive naturals, for example, 988150 + ... + 988159.

It is an arithmetic number, because the mean of its divisors is an integer number (2964465).

Almost surely, 2^9881545 is an apocalyptic number.

It is an amenable number.

9881545 is a deficient number, since it is larger than the sum of its proper divisors (1976315).

9881545 is a wasteful number, since it uses less digits than its factorization.

9881545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976314.

The product of its digits is 57600, while the sum is 40.

The square root of 9881545 is about 3143.4924844828. The cubic root of 9881545 is about 214.5894092811.

The spelling of 9881545 in words is "nine million, eight hundred eighty-one thousand, five hundred forty-five".