24121661 has 2 divisors, whose sum is σ = 24121662. Its totient is φ = 24121660.

The previous prime is 24121633. The next prime is 24121663. The reversal of 24121661 is 16612142.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22033636 + 2088025 = 4694^2 + 1445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24121661 is a prime.

It is a Sophie Germain prime.

Together with 24121663, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24121663) 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, 12060830 + 12060831.

It is an arithmetic number, because the mean of its divisors is an integer number (12060831).

Almost surely, 2^24121661 is an apocalyptic number.

It is an amenable number.

24121661 is a deficient number, since it is larger than the sum of its proper divisors (1).

24121661 is an equidigital number, since it uses as much as digits as its factorization.

24121661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

The square root of 24121661 is about 4911.3807630849. The cubic root of 24121661 is about 288.9364970246.

The spelling of 24121661 in words is "twenty-four million, one hundred twenty-one thousand, six hundred sixty-one".