686465 has 16 divisors (see below), whose sum is σ = 907200. Its totient is φ = 495552.

The previous prime is 686453. The next prime is 686473. The reversal of 686465 is 564686.

It is a cyclic number.

It is not a de Polignac number, because 686465 - 2⁴ = 686449 is a prime.

Its product of digits (34560) is a multiple of the sum of its prime divisors (256).

It is a plaindrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 686465.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3746 + ... + 3924.

It is an arithmetic number, because the mean of its divisors is an integer number (56700).

2⁶⁸⁶⁴⁶⁵ is an apocalyptic number.

686465 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

686465 is a deficient number, since it is larger than the sum of its proper divisors (220735).

686465 is a wasteful number, since it uses less digits than its factorization.

686465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256.

The product of its digits is 34560, while the sum is 35.

The square root of 686465 is about 828.5318340293. The cubic root of 686465 is about 88.2143963145.

The spelling of 686465 in words is "six hundred eighty-six thousand, four hundred sixty-five".