4242409 has 2 divisors, whose sum is σ = 4242410. Its totient is φ = 4242408.

The previous prime is 4242397. The next prime is 4242421. The reversal of 4242409 is 9042424.

It is a balanced prime because it is at equal distance from previous prime (4242397) and next prime (4242421).

It can be written as a sum of positive squares in only one way, i.e., 4012009 + 230400 = 2003^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 4242409 - 2¹⁷ = 4111337 is a prime.

It is not a weakly prime, because it can be changed into another prime (4242449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121204 + 2121205.

It is an arithmetic number, because the mean of its divisors is an integer number (2121205).

Almost surely, 2^4242409 is an apocalyptic number.

It is an amenable number.

4242409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4242409 is an equidigital number, since it uses as much as digits as its factorization.

4242409 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 4242409 is about 2059.7109020443. The cubic root of 4242409 is about 161.8840937930.

The spelling of 4242409 in words is "four million, two hundred forty-two thousand, four hundred nine".