687071252 has 24 divisors (see below), whose sum is σ = 1454975424. Its totient is φ = 277137792.

The previous prime is 687071237. The next prime is 687071257. The reversal of 687071252 is 252170786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687071257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 721238 + ... + 722189.

It is an arithmetic number, because the mean of its divisors is an integer number (60623976).

Almost surely, 2^687071252 is an apocalyptic number.

It is an amenable number.

687071252 is an abundant number, since it is smaller than the sum of its proper divisors (767904172).

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

687071252 is a wasteful number, since it uses less digits than its factorization.

687071252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443455 (or 1443453 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 687071252 is about 26212.0440256001. The cubic root of 687071252 is about 882.4035754016.

The spelling of 687071252 in words is "six hundred eighty-seven million, seventy-one thousand, two hundred fifty-two".