242504209 has 2 divisors, whose sum is σ = 242504210. Its totient is φ = 242504208.

The previous prime is 242504183. The next prime is 242504231. The reversal of 242504209 is 902405242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241895809 + 608400 = 15553^2 + 780^2 .

It is a cyclic number.

It is not a de Polignac number, because 242504209 - 2¹⁷ = 242373137 is a prime.

It is not a weakly prime, because it can be changed into another prime (242504279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121252104 + 121252105.

It is an arithmetic number, because the mean of its divisors is an integer number (121252105).

Almost surely, 2^242504209 is an apocalyptic number.

It is an amenable number.

242504209 is a deficient number, since it is larger than the sum of its proper divisors (1).

242504209 is an equidigital number, since it uses as much as digits as its factorization.

242504209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 242504209 is about 15572.5466446564. The cubic root of 242504209 is about 623.6004600801.

The spelling of 242504209 in words is "two hundred forty-two million, five hundred four thousand, two hundred nine".