687272 has 8 divisors (see below), whose sum is σ = 1288650. Its totient is φ = 343632.

The previous prime is 687233. The next prime is 687277. The reversal of 687272 is 272786.

687272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 649636 + 37636 = 806^2 + 194^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (687277) by changing a digit.

687272 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42947 + ... + 42962.

2⁶⁸⁷²⁷² is an apocalyptic number.

It is an amenable number.

687272 is a deficient number, since it is larger than the sum of its proper divisors (601378).

687272 is a wasteful number, since it uses less digits than its factorization.

687272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85915 (or 85911 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 687272 is about 829.0186970147. The cubic root of 687272 is about 88.2489507054.

It can be divided in two parts, 687 and 272, that added together give a palindrome (959).

The spelling of 687272 in words is "six hundred eighty-seven thousand, two hundred seventy-two".