1005239 has 2 divisors, whose sum is σ = 1005240. Its totient is φ = 1005238.

The previous prime is 1005229. The next prime is 1005241. The reversal of 1005239 is 9325001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1005239 - 2⁴ = 1005223 is a prime.

It is a Sophie Germain prime.

Together with 1005241, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1005239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502619 + 502620.

It is an arithmetic number, because the mean of its divisors is an integer number (502620).

2^1005239 is an apocalyptic number.

1005239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005239 is an equidigital number, since it uses as much as digits as its factorization.

1005239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1005239 is about 1002.6160780678. The cubic root of 1005239 is about 100.1743292499.

The spelling of 1005239 in words is "one million, five thousand, two hundred thirty-nine".