1142509 has 2 divisors, whose sum is σ = 1142510. Its totient is φ = 1142508.

The previous prime is 1142507. The next prime is 1142539. The reversal of 1142509 is 9052411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 980100 + 162409 = 990^2 + 403^2 .

It is an emirp because it is prime and its reverse (9052411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1142509 - 2¹ = 1142507 is a prime.

Together with 1142507, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

1142509 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1142509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1142503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571254 + 571255.

It is an arithmetic number, because the mean of its divisors is an integer number (571255).

2^1142509 is an apocalyptic number.

It is an amenable number.

1142509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142509 is an equidigital number, since it uses as much as digits as its factorization.

1142509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1142509 is about 1068.8821263357. The cubic root of 1142509 is about 104.5409742939.

The spelling of 1142509 in words is "one million, one hundred forty-two thousand, five hundred nine".