9876121 has 4 divisors (see below), whose sum is σ = 10117044. Its totient is φ = 9635200.

The previous prime is 9876109. The next prime is 9876137. The reversal of 9876121 is 1216789.

It is a happy number.

9876121 is digitally balanced in base 2 and base 3, because in such bases 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 an emirpimes, since its reverse is a distinct semiprime: 1216789 = 7 ⋅173827.

It can be written as a sum of positive squares in 2 ways, for example, as 2368521 + 7507600 = 1539^2 + 2740^2 .

It is a cyclic number.

It is not a de Polignac number, because 9876121 - 2¹³ = 9867929 is a prime.

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

It is a Duffinian number.

9876121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9876101) 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, 120400 + ... + 120481.

It is an arithmetic number, because the mean of its divisors is an integer number (2529261).

Almost surely, 2^9876121 is an apocalyptic number.

It is an amenable number.

9876121 is a deficient number, since it is larger than the sum of its proper divisors (240923).

9876121 is a wasteful number, since it uses less digits than its factorization.

9876121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240922.

The product of its digits is 6048, while the sum is 34.

The square root of 9876121 is about 3142.6296313756. The cubic root of 9876121 is about 214.5501392418.

The spelling of 9876121 in words is "nine million, eight hundred seventy-six thousand, one hundred twenty-one".