9871005 has 16 divisors (see below), whose sum is σ = 15949440. Its totient is φ = 5212608.

The previous prime is 9870983. The next prime is 9871007. The reversal of 9871005 is 5001789.

It is a de Polignac number, because none of the positive numbers 2^k-9871005 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9871007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1650 + ... + 4739.

It is an arithmetic number, because the mean of its divisors is an integer number (996840).

Almost surely, 2^9871005 is an apocalyptic number.

It is an amenable number.

9871005 is a deficient number, since it is larger than the sum of its proper divisors (6078435).

9871005 is a wasteful number, since it uses less digits than its factorization.

9871005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6500.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 9871005 is about 3141.8155579219. The cubic root of 9871005 is about 214.5130859595.

The spelling of 9871005 in words is "nine million, eight hundred seventy-one thousand, five".