120402209 has 2 divisors, whose sum is σ = 120402210. Its totient is φ = 120402208.

The previous prime is 120402173. The next prime is 120402251. The reversal of 120402209 is 902204021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115240225 + 5161984 = 10735^2 + 2272^2 .

It is an emirp because it is prime and its reverse (902204021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120402209 - 2¹⁶ = 120336673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (120402509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60201104 + 60201105.

It is an arithmetic number, because the mean of its divisors is an integer number (60201105).

Almost surely, 2^120402209 is an apocalyptic number.

It is an amenable number.

120402209 is a deficient number, since it is larger than the sum of its proper divisors (1).

120402209 is an equidigital number, since it uses as much as digits as its factorization.

120402209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 120402209 is about 10972.7940379832. The cubic root of 120402209 is about 493.7928740423.

The spelling of 120402209 in words is "one hundred twenty million, four hundred two thousand, two hundred nine".