685126 has 12 divisors (see below), whose sum is σ = 1113372. Its totient is φ = 316056.

The previous prime is 685123. The next prime is 685141. The reversal of 685126 is 621586.

It is a junction number, because it is equal to n+sod(n) for n = 685094 and 685103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 676 + ... + 1351.

It is an arithmetic number, because the mean of its divisors is an integer number (92781).

2⁶⁸⁵¹²⁶ is an apocalyptic number.

685126 is the 676-th pentagonal number.

685126 is a deficient number, since it is larger than the sum of its proper divisors (428246).

685126 is a wasteful number, since it uses less digits than its factorization.

685126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055 (or 2042 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 685126 is about 827.7233837460. The cubic root of 685126 is about 88.1570027791.

The spelling of 685126 in words is "six hundred eighty-five thousand, one hundred twenty-six".