4240399 has 2 divisors, whose sum is σ = 4240400. Its totient is φ = 4240398.

The previous prime is 4240381. The next prime is 4240417. The reversal of 4240399 is 9930424.

It is a balanced prime because it is at equal distance from previous prime (4240381) and next prime (4240417).

It is a cyclic number.

It is not a de Polignac number, because 4240399 - 2¹⁵ = 4207631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4240399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4240319) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2120199 + 2120200.

It is an arithmetic number, because the mean of its divisors is an integer number (2120200).

Almost surely, 2^4240399 is an apocalyptic number.

4240399 is a deficient number, since it is larger than the sum of its proper divisors (1).

4240399 is an equidigital number, since it uses as much as digits as its factorization.

4240399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 4240399 is about 2059.2229116829. Note that the first 3 decimals coincide. The cubic root of 4240399 is about 161.8585235388.

The spelling of 4240399 in words is "four million, two hundred forty thousand, three hundred ninety-nine".