4242402402409 has 2 divisors, whose sum is σ = 4242402402410. Its totient is φ = 4242402402408.

The previous prime is 4242402402401. The next prime is 4242402402437. The reversal of 4242402402409 is 9042042042424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4217157959184 + 25244443225 = 2053572^2 + 158885^2 .

It is a cyclic number.

It is not a de Polignac number, because 4242402402409 - 2³ = 4242402402401 is a prime.

It is not a weakly prime, because it can be changed into another prime (4242402402401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121201201204 + 2121201201205.

It is an arithmetic number, because the mean of its divisors is an integer number (2121201201205).

Almost surely, 2^{4242402402409} is an apocalyptic number.

It is an amenable number.

4242402402409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4242402402409 is an equidigital number, since it uses as much as digits as its factorization.

4242402402409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 37.

The spelling of 4242402402409 in words is "four trillion, two hundred forty-two billion, four hundred two million, four hundred two thousand, four hundred nine".