685154 has 8 divisors (see below), whose sum is σ = 1063260. Its totient is φ = 330736.

The previous prime is 685141. The next prime is 685169. The reversal of 685154 is 451586.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 683929 + 1225 = 827^2 + 35^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

685154 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5849 + ... + 5964.

2⁶⁸⁵¹⁵⁴ is an apocalyptic number.

685154 is a deficient number, since it is larger than the sum of its proper divisors (378106).

685154 is a wasteful number, since it uses less digits than its factorization.

685154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11844.

The product of its digits is 4800, while the sum is 29.

The square root of 685154 is about 827.7402974363. The cubic root of 685154 is about 88.1582037078.

The spelling of 685154 in words is "six hundred eighty-five thousand, one hundred fifty-four".