1244042209 has 2 divisors, whose sum is σ = 1244042210. Its totient is φ = 1244042208.

The previous prime is 1244042171. The next prime is 1244042257. The reversal of 1244042209 is 9022404421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1174569984 + 69472225 = 34272^2 + 8335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244042209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1244042299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622021104 + 622021105.

It is an arithmetic number, because the mean of its divisors is an integer number (622021105).

Almost surely, 2^1244042209 is an apocalyptic number.

It is an amenable number.

1244042209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244042209 is an equidigital number, since it uses as much as digits as its factorization.

1244042209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 1244042209 is about 35270.9825352229. The cubic root of 1244042209 is about 1075.5031958992.

The spelling of 1244042209 in words is "one billion, two hundred forty-four million, forty-two thousand, two hundred nine".