24881921 has 2 divisors, whose sum is σ = 24881922. Its totient is φ = 24881920.

The previous prime is 24881903. The next prime is 24881939. The reversal of 24881921 is 12918842.

It is a balanced prime because it is at equal distance from previous prime (24881903) and next prime (24881939).

It can be written as a sum of positive squares in only one way, i.e., 24611521 + 270400 = 4961^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 24881921 - 2¹⁰ = 24880897 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (24881951) 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 as a sum of consecutive naturals, namely, 12440960 + 12440961.

It is an arithmetic number, because the mean of its divisors is an integer number (12440961).

Almost surely, 2^24881921 is an apocalyptic number.

It is an amenable number.

24881921 is a deficient number, since it is larger than the sum of its proper divisors (1).

24881921 is an equidigital number, since it uses as much as digits as its factorization.

24881921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 35.

The square root of 24881921 is about 4988.1781243256. The cubic root of 24881921 is about 291.9406936851.

The spelling of 24881921 in words is "twenty-four million, eight hundred eighty-one thousand, nine hundred twenty-one".