840059 has 4 divisors (see below), whose sum is σ = 916440. Its totient is φ = 763680.

The previous prime is 840053. The next prime is 840061. The reversal of 840059 is 950048.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 840059 - 2¹⁶ = 774523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38174 + ... + 38195.

It is an arithmetic number, because the mean of its divisors is an integer number (229110).

2⁸⁴⁰⁰⁵⁹ is an apocalyptic number.

840059 is a deficient number, since it is larger than the sum of its proper divisors (76381).

840059 is a wasteful number, since it uses less digits than its factorization.

840059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76380.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 840059 is about 916.5473255648. The cubic root of 840059 is about 94.3560886335.

The spelling of 840059 in words is "eight hundred forty thousand, fifty-nine".