9805145 has 24 divisors (see below), whose sum is σ = 14139648. Its totient is φ = 6501600.

The previous prime is 9805099. The next prime is 9805157. The reversal of 9805145 is 5415089.

It is not a de Polignac number, because 9805145 - 2¹² = 9801049 is a prime.

It is a super-2 number, since 2×9805145² = 192281736942050, which contains 22 as substring.

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 6950 + ... + 8240.

It is an arithmetic number, because the mean of its divisors is an integer number (589152).

Almost surely, 2^9805145 is an apocalyptic number.

It is an amenable number.

9805145 is a deficient number, since it is larger than the sum of its proper divisors (4334503).

9805145 is a wasteful number, since it uses less digits than its factorization.

9805145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341 (or 1334 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 9805145 is about 3131.3168156544. The cubic root of 9805145 is about 214.0349391231.

The spelling of 9805145 in words is "nine million, eight hundred five thousand, one hundred forty-five".