24561961 has 2 divisors, whose sum is σ = 24561962. Its totient is φ = 24561960.

The previous prime is 24561959. The next prime is 24561983. The reversal of 24561961 is 16916542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24561936 + 25 = 4956^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 24561961 - 2¹ = 24561959 is a prime.

Together with 24561959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (24561461) 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, 12280980 + 12280981.

It is an arithmetic number, because the mean of its divisors is an integer number (12280981).

Almost surely, 2^24561961 is an apocalyptic number.

It is an amenable number.

24561961 is a deficient number, since it is larger than the sum of its proper divisors (1).

24561961 is an equidigital number, since it uses as much as digits as its factorization.

24561961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 24561961 is about 4956.0025221947. The cubic root of 24561961 is about 290.6839228584.

The spelling of 24561961 in words is "twenty-four million, five hundred sixty-one thousand, nine hundred sixty-one".