9865420 has 48 divisors (see below), whose sum is σ = 21718368. Its totient is φ = 3760640.

The previous prime is 9865417. The next prime is 9865433. The reversal of 9865420 is 245689.

It is a happy number.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43347 + ... + 43573.

It is an arithmetic number, because the mean of its divisors is an integer number (452466).

Almost surely, 2^9865420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9865420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10859184).

9865420 is an abundant number, since it is smaller than the sum of its proper divisors (11852948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9865420 is a wasteful number, since it uses less digits than its factorization.

9865420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 9865420 is about 3140.9266148702. The cubic root of 9865420 is about 214.4726212649.

The spelling of 9865420 in words is "nine million, eight hundred sixty-five thousand, four hundred twenty".