10872121 has 4 divisors (see below), whose sum is σ = 11708452. Its totient is φ = 10035792.

The previous prime is 10872101. The next prime is 10872131. The reversal of 10872121 is 12127801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5112121 + 5760000 = 2261^2 + 2400^2 .

It is not a de Polignac number, because 10872121 - 2¹¹ = 10870073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10872092 and 10872101.

It is not an unprimeable number, because it can be changed into a prime (10872101) 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 3 ways as a sum of consecutive naturals, for example, 418146 + ... + 418171.

It is an arithmetic number, because the mean of its divisors is an integer number (2927113).

Almost surely, 2^10872121 is an apocalyptic number.

It is an amenable number.

10872121 is a deficient number, since it is larger than the sum of its proper divisors (836331).

10872121 is an equidigital number, since it uses as much as digits as its factorization.

10872121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836330.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 10872121 is about 3297.2899478208. The cubic root of 10872121 is about 221.5328284226.

Adding to 10872121 its reverse (12127801), we get a palindrome (22999922).

The spelling of 10872121 in words is "ten million, eight hundred seventy-two thousand, one hundred twenty-one".