24121681 has 2 divisors, whose sum is σ = 24121682. Its totient is φ = 24121680.

The previous prime is 24121679. The next prime is 24121703. The reversal of 24121681 is 18612142.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18318400 + 5803281 = 4280^2 + 2409^2 .

It is a cyclic number.

It is not a de Polignac number, because 24121681 - 2¹ = 24121679 is a prime.

It is a super-2 number, since 2×24121681² = 1163710988531522, which contains 22 as substring.

Together with 24121679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (24121661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12060840 + 12060841.

It is an arithmetic number, because the mean of its divisors is an integer number (12060841).

Almost surely, 2^24121681 is an apocalyptic number.

It is an amenable number.

24121681 is a deficient number, since it is larger than the sum of its proper divisors (1).

24121681 is an equidigital number, since it uses as much as digits as its factorization.

24121681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 25.

The square root of 24121681 is about 4911.3827991717. The cubic root of 24121681 is about 288.9365768799.

The spelling of 24121681 in words is "twenty-four million, one hundred twenty-one thousand, six hundred eighty-one".