9865455 has 16 divisors (see below), whose sum is σ = 15840384. Its totient is φ = 5243040.

The previous prime is 9865451. The next prime is 9865511. The reversal of 9865455 is 5545689.

It is not a de Polignac number, because 9865455 - 2² = 9865451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9865451) 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, 3972 + ... + 5958.

It is an arithmetic number, because the mean of its divisors is an integer number (990024).

Almost surely, 2^9865455 is an apocalyptic number.

9865455 is a deficient number, since it is larger than the sum of its proper divisors (5974929).

9865455 is a wasteful number, since it uses less digits than its factorization.

9865455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326.

The product of its digits is 216000, while the sum is 42.

The square root of 9865455 is about 3140.9321864695. The cubic root of 9865455 is about 214.4728748960.

It can be divided in two parts, 986 and 5455, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 9865455 in words is "nine million, eight hundred sixty-five thousand, four hundred fifty-five".