871439 has 2 divisors, whose sum is σ = 871440. Its totient is φ = 871438.

The previous prime is 871393. The next prime is 871459. The reversal of 871439 is 934178.

871439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 871439 - 2¹² = 867343 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 871439.

It is not a weakly prime, because it can be changed into another prime (871459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435719 + 435720.

It is an arithmetic number, because the mean of its divisors is an integer number (435720).

2⁸⁷¹⁴³⁹ is an apocalyptic number.

871439 is a deficient number, since it is larger than the sum of its proper divisors (1).

871439 is an equidigital number, since it uses as much as digits as its factorization.

871439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 871439 is about 933.5089715691. The cubic root of 871439 is about 95.5166313332.

The spelling of 871439 in words is "eight hundred seventy-one thousand, four hundred thirty-nine".