942509 has 2 divisors, whose sum is σ = 942510. Its totient is φ = 942508.

The previous prime is 942479. The next prime is 942521. The reversal of 942509 is 905249.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 714025 + 228484 = 845^2 + 478^2 .

It is an emirp because it is prime and its reverse (905249) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-942509 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 942509.

It is not a weakly prime, because it can be changed into another prime (942569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 471254 + 471255.

It is an arithmetic number, because the mean of its divisors is an integer number (471255).

2⁹⁴²⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

942509 is a deficient number, since it is larger than the sum of its proper divisors (1).

942509 is an equidigital number, since it uses as much as digits as its factorization.

942509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 942509 is about 970.8290271721. The cubic root of 942509 is about 98.0456888168.

The spelling of 942509 in words is "nine hundred forty-two thousand, five hundred nine".