688425 has 24 divisors (see below), whose sum is σ = 1163616. Its totient is φ = 359040.

The previous prime is 688423. The next prime is 688433. The reversal of 688425 is 524886.

It is not a de Polignac number, because 688425 - 2¹ = 688423 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 688425.

It is not an unprimeable number, because it can be changed into a prime (688423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4957 + ... + 5093.

It is an arithmetic number, because the mean of its divisors is an integer number (48484).

2⁶⁸⁸⁴²⁵ is an apocalyptic number.

It is an amenable number.

688425 is a deficient number, since it is larger than the sum of its proper divisors (475191).

688425 is a wasteful number, since it uses less digits than its factorization.

688425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 212 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 688425 is about 829.7138060801. The cubic root of 688425 is about 88.2982733376.

The spelling of 688425 in words is "six hundred eighty-eight thousand, four hundred twenty-five".