104242409 has 2 divisors, whose sum is σ = 104242410. Its totient is φ = 104242408.

The previous prime is 104242393. The next prime is 104242421. The reversal of 104242409 is 904242401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97456384 + 6786025 = 9872^2 + 2605^2 .

It is a cyclic number.

It is not a de Polignac number, because 104242409 - 2⁴ = 104242393 is a prime.

It is not a weakly prime, because it can be changed into another prime (104242469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52121204 + 52121205.

It is an arithmetic number, because the mean of its divisors is an integer number (52121205).

Almost surely, 2^104242409 is an apocalyptic number.

It is an amenable number.

104242409 is a deficient number, since it is larger than the sum of its proper divisors (1).

104242409 is an equidigital number, since it uses as much as digits as its factorization.

104242409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 104242409 is about 10209.9171886945. The cubic root of 104242409 is about 470.6320288340.

The spelling of 104242409 in words is "one hundred four million, two hundred forty-two thousand, four hundred nine".