2042120609 has 2 divisors, whose sum is σ = 2042120610. Its totient is φ = 2042120608.

The previous prime is 2042120569. The next prime is 2042120681. The reversal of 2042120609 is 9060212402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2034280609 + 7840000 = 45103^2 + 2800^2 .

It is a cyclic number.

It is not a de Polignac number, because 2042120609 - 2¹² = 2042116513 is a prime.

It is not a weakly prime, because it can be changed into another prime (2042120809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021060304 + 1021060305.

It is an arithmetic number, because the mean of its divisors is an integer number (1021060305).

Almost surely, 2^2042120609 is an apocalyptic number.

It is an amenable number.

2042120609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2042120609 is an equidigital number, since it uses as much as digits as its factorization.

2042120609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2042120609 is about 45189.8286011355. The cubic root of 2042120609 is about 1268.7044487711.

The spelling of 2042120609 in words is "two billion, forty-two million, one hundred twenty thousand, six hundred nine".