687124 has 12 divisors (see below), whose sum is σ = 1208704. Its totient is φ = 341784.

The previous prime is 687121. The next prime is 687131. The reversal of 687124 is 421786.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 687092 and 687101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829 + ... + 1435.

2⁶⁸⁷¹²⁴ is an apocalyptic number.

It is an amenable number.

687124 is a deficient number, since it is larger than the sum of its proper divisors (521580).

687124 is a wasteful number, since it uses less digits than its factorization.

687124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 892 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 687124 is about 828.9294300482. The cubic root of 687124 is about 88.2426156190.

The spelling of 687124 in words is "six hundred eighty-seven thousand, one hundred twenty-four".