840755 has 4 divisors (see below), whose sum is σ = 1008912. Its totient is φ = 672600.

The previous prime is 840743. The next prime is 840757. The reversal of 840755 is 557048.

840755 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 840755 - 2¹⁰ = 839731 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (840757) 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, 84071 + ... + 84080.

It is an arithmetic number, because the mean of its divisors is an integer number (252228).

2⁸⁴⁰⁷⁵⁵ is an apocalyptic number.

840755 is a deficient number, since it is larger than the sum of its proper divisors (168157).

840755 is a wasteful number, since it uses less digits than its factorization.

840755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168156.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 840755 is about 916.9269327487. The cubic root of 840755 is about 94.3821398630.

The spelling of 840755 in words is "eight hundred forty thousand, seven hundred fifty-five".