24042409 has 2 divisors, whose sum is σ = 24042410. Its totient is φ = 24042408.

The previous prime is 24042407. The next prime is 24042419. The reversal of 24042409 is 90424042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15776784 + 8265625 = 3972^2 + 2875^2 .

It is a cyclic number.

It is not a de Polignac number, because 24042409 - 2¹ = 24042407 is a prime.

Together with 24042407, it forms a pair of twin primes.

It is equal to p_1509640 and since 24042409 and 1509640 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (24042407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12021204 + 12021205.

It is an arithmetic number, because the mean of its divisors is an integer number (12021205).

Almost surely, 2^24042409 is an apocalyptic number.

It is an amenable number.

24042409 is a deficient number, since it is larger than the sum of its proper divisors (1).

24042409 is an equidigital number, since it uses as much as digits as its factorization.

24042409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 24042409 is about 4903.3059255975. The cubic root of 24042409 is about 288.6197150912.

The spelling of 24042409 in words is "twenty-four million, forty-two thousand, four hundred nine".