1025239 has 2 divisors, whose sum is σ = 1025240. Its totient is φ = 1025238.

The previous prime is 1025231. The next prime is 1025257. The reversal of 1025239 is 9325201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1025239 - 2³ = 1025231 is a prime.

It is a super-2 number, since 2×1025239² = 2102230014242, which contains 22 as substring.

It is equal to p₈₀₃₅₆ and since 1025239 and 80356 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025231) 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, 512619 + 512620.

It is an arithmetic number, because the mean of its divisors is an integer number (512620).

2^1025239 is an apocalyptic number.

1025239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025239 is an equidigital number, since it uses as much as digits as its factorization.

1025239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1025239 is about 1012.5408633729. The cubic root of 1025239 is about 100.8343197469.

The spelling of 1025239 in words is "one million, twenty-five thousand, two hundred thirty-nine".