24642251 has 2 divisors, whose sum is σ = 24642252. Its totient is φ = 24642250.

The previous prime is 24642229. The next prime is 24642263. The reversal of 24642251 is 15224642.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 24642251 - 2¹⁸ = 24380107 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 24642251.

It is not a weakly prime, because it can be changed into another prime (24642281) 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 as a sum of consecutive naturals, namely, 12321125 + 12321126.

It is an arithmetic number, because the mean of its divisors is an integer number (12321126).

Almost surely, 2^24642251 is an apocalyptic number.

24642251 is a deficient number, since it is larger than the sum of its proper divisors (1).

24642251 is an equidigital number, since it uses as much as digits as its factorization.

24642251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 26.

The square root of 24642251 is about 4964.0961916546. The cubic root of 24642251 is about 291.0003149070. Note that the first 3 decimals are identical.

Adding to 24642251 its reverse (15224642), we get a palindrome (39866893).

The spelling of 24642251 in words is "twenty-four million, six hundred forty-two thousand, two hundred fifty-one".