24172121 has 4 divisors (see below), whose sum is σ = 24334500. Its totient is φ = 24009744.

The previous prime is 24172091. The next prime is 24172153. The reversal of 24172121 is 12127142.

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 14784025 + 9388096 = 3845^2 + 3064^2 .

It is a cyclic number.

It is not a de Polignac number, because 24172121 - 2¹⁴ = 24155737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 24172093 and 24172102.

It is not an unprimeable number, because it can be changed into a prime (24175121) 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, 80966 + ... + 81263.

It is an arithmetic number, because the mean of its divisors is an integer number (6083625).

Almost surely, 2^24172121 is an apocalyptic number.

It is an amenable number.

24172121 is a deficient number, since it is larger than the sum of its proper divisors (162379).

24172121 is a wasteful number, since it uses less digits than its factorization.

24172121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162378.

The product of its digits is 224, while the sum is 20.

The square root of 24172121 is about 4916.5151276082. The cubic root of 24172121 is about 289.1378317089.

Adding to 24172121 its reverse (12127142), we get a palindrome (36299263).

The spelling of 24172121 in words is "twenty-four million, one hundred seventy-two thousand, one hundred twenty-one".