1025839 has 2 divisors, whose sum is σ = 1025840. Its totient is φ = 1025838.

The previous prime is 1025819. The next prime is 1025873. The reversal of 1025839 is 9385201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1025839 - 2⁵ = 1025807 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512919 + 512920.

It is an arithmetic number, because the mean of its divisors is an integer number (512920).

2^1025839 is an apocalyptic number.

1025839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025839 is an equidigital number, since it uses as much as digits as its factorization.

1025839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1025839 is about 1012.8371043756. The cubic root of 1025839 is about 100.8539863136.

The spelling of 1025839 in words is "one million, twenty-five thousand, eight hundred thirty-nine".