840465 has 24 divisors (see below), whose sum is σ = 1535040. Its totient is φ = 424224.

The previous prime is 840457. The next prime is 840467. The reversal of 840465 is 564048.

It is not a de Polignac number, because 840465 - 2³ = 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 840465.

It is not an unprimeable number, because it can be changed into a prime (840467) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 364 + ... + 1346.

It is an arithmetic number, because the mean of its divisors is an integer number (63960).

2⁸⁴⁰⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

840465 is a deficient number, since it is larger than the sum of its proper divisors (694575).

840465 is a wasteful number, since it uses less digits than its factorization.

840465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013 (or 1010 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 840465 is about 916.7687821910. The cubic root of 840465 is about 94.3712869320.

The spelling of 840465 in words is "eight hundred forty thousand, four hundred sixty-five".