687412 has 24 divisors (see below), whose sum is σ = 1391040. Its totient is φ = 293760.

The previous prime is 687403. The next prime is 687413. The reversal of 687412 is 214786.

687412 is nontrivially palindromic in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687413) 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 7 ways as a sum of consecutive naturals, for example, 289 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (57960).

2⁶⁸⁷⁴¹² is an apocalyptic number.

It is an amenable number.

687412 is an abundant number, since it is smaller than the sum of its proper divisors (703628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687412 is a wasteful number, since it uses less digits than its factorization.

687412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951 (or 949 counting only the distinct ones).

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

The square root of 687412 is about 829.1031298940. The cubic root of 687412 is about 88.2549425176.

It can be divided in two parts, 6874 and 12, that added together give a palindrome (6886).

The spelling of 687412 in words is "six hundred eighty-seven thousand, four hundred twelve".