685425 has 48 divisors (see below), whose sum is σ = 1319360. Its totient is φ = 311040.

The previous prime is 685417. The next prime is 685427. The reversal of 685425 is 524586.

It is not a de Polignac number, because 685425 - 2³ = 685417 is a prime.

685425 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 685392 and 685401.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 685425.

It is not an unprimeable number, because it can be changed into a prime (685427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18507 + ... + 18543.

2⁶⁸⁵⁴²⁵ is an apocalyptic number.

685425 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

685425 is a deficient number, since it is larger than the sum of its proper divisors (633935).

685425 is a wasteful number, since it uses less digits than its factorization.

685425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 77 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 685425 is about 827.9039799397. The cubic root of 685425 is about 88.1698252917.

The spelling of 685425 in words is "six hundred eighty-five thousand, four hundred twenty-five".