840459 has 8 divisors (see below), whose sum is σ = 1148112. Its totient is φ = 546560.

The previous prime is 840457. The next prime is 840467. The reversal of 840459 is 954048.

840459 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 840459 - 2¹ = 840457 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840459.

It is not an unprimeable number, because it can be changed into a prime (840451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3294 + ... + 3539.

It is an arithmetic number, because the mean of its divisors is an integer number (143514).

2⁸⁴⁰⁴⁵⁹ is an apocalyptic number.

840459 is a deficient number, since it is larger than the sum of its proper divisors (307653).

840459 is a wasteful number, since it uses less digits than its factorization.

840459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6877.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 840459 is about 916.7655098224. The cubic root of 840459 is about 94.3710623622.

The spelling of 840459 in words is "eight hundred forty thousand, four hundred fifty-nine".