9872101 has 4 divisors (see below), whose sum is σ = 9878400. Its totient is φ = 9865804.

The previous prime is 9872099. The next prime is 9872111. The reversal of 9872101 is 1012789.

9872101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9872101 - 2¹ = 9872099 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9872101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9872111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1260 + ... + 4618.

It is an arithmetic number, because the mean of its divisors is an integer number (2469600).

Almost surely, 2^9872101 is an apocalyptic number.

It is an amenable number.

9872101 is a deficient number, since it is larger than the sum of its proper divisors (6299).

9872101 is a wasteful number, since it uses less digits than its factorization.

9872101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6298.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 9872101 is about 3141.9899745225. The cubic root of 9872101 is about 214.5210249566.

Multiplying 9872101 by its sum of digits (28), we get a triangular number (276418828 = T₂₃₅₁₂).

The spelling of 9872101 in words is "nine million, eight hundred seventy-two thousand, one hundred one".