840495 has 16 divisors (see below), whose sum is σ = 1357920. Its totient is φ = 443904.

The previous prime is 840491. The next prime is 840523. The reversal of 840495 is 594048.

It is not a de Polignac number, because 840495 - 2² = 840491 is a 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 840495.

It is not an unprimeable number, because it can be changed into a prime (840491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1851 + ... + 2259.

It is an arithmetic number, because the mean of its divisors is an integer number (84870).

2⁸⁴⁰⁴⁹⁵ is an apocalyptic number.

840495 is a deficient number, since it is larger than the sum of its proper divisors (517425).

840495 is a wasteful number, since it uses less digits than its factorization.

840495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554.

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

The square root of 840495 is about 916.7851438587. The cubic root of 840495 is about 94.3724097647.

The spelling of 840495 in words is "eight hundred forty thousand, four hundred ninety-five".