24399121 has 4 divisors (see below), whose sum is σ = 25240500. Its totient is φ = 23557744.

The previous prime is 24399119. The next prime is 24399127. The reversal of 24399121 is 12199342.

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 10627600 + 13771521 = 3260^2 + 3711^2 .

It is not a de Polignac number, because 24399121 - 2¹ = 24399119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24399127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420646 + ... + 420703.

It is an arithmetic number, because the mean of its divisors is an integer number (6310125).

Almost surely, 2^24399121 is an apocalyptic number.

It is an amenable number.

24399121 is a deficient number, since it is larger than the sum of its proper divisors (841379).

24399121 is an equidigital number, since it uses as much as digits as its factorization.

24399121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841378.

The product of its digits is 3888, while the sum is 31.

The square root of 24399121 is about 4939.5466391158. The cubic root of 24399121 is about 290.0401093948.

The spelling of 24399121 in words is "twenty-four million, three hundred ninety-nine thousand, one hundred twenty-one".