24706421 has 2 divisors, whose sum is σ = 24706422. Its totient is φ = 24706420.

The previous prime is 24706397. The next prime is 24706471. The reversal of 24706421 is 12460742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18879025 + 5827396 = 4345^2 + 2414^2 .

It is a cyclic number.

It is not a de Polignac number, because 24706421 - 2¹⁰ = 24705397 is a prime.

It is a super-2 number, since 2×24706421² = 1220814477258482, which contains 22 as substring.

It is a Sophie Germain 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 (24706471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12353210 + 12353211.

It is an arithmetic number, because the mean of its divisors is an integer number (12353211).

Almost surely, 2^24706421 is an apocalyptic number.

It is an amenable number.

24706421 is a deficient number, since it is larger than the sum of its proper divisors (1).

24706421 is an equidigital number, since it uses as much as digits as its factorization.

24706421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 24706421 is about 4970.5554015623. Note that the first 3 decimals coincide. The cubic root of 24706421 is about 291.2526904527.

The spelling of 24706421 in words is "twenty-four million, seven hundred six thousand, four hundred twenty-one".