1442421509 has 2 divisors, whose sum is σ = 1442421510. Its totient is φ = 1442421508.

The previous prime is 1442421503. The next prime is 1442421523. The reversal of 1442421509 is 9051242441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1442328484 + 93025 = 37978^2 + 305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1442421509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1442421503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721210754 + 721210755.

It is an arithmetic number, because the mean of its divisors is an integer number (721210755).

Almost surely, 2^1442421509 is an apocalyptic number.

It is an amenable number.

1442421509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1442421509 is an equidigital number, since it uses as much as digits as its factorization.

1442421509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1442421509 is about 37979.2247024607. The cubic root of 1442421509 is about 1129.8758599628.

The spelling of 1442421509 in words is "one billion, four hundred forty-two million, four hundred twenty-one thousand, five hundred nine".