687254 has 4 divisors (see below), whose sum is σ = 1030884. Its totient is φ = 343626.

The previous prime is 687233. The next prime is 687277. The reversal of 687254 is 452786.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 687254.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 687254.

It is an unprimeable number.

687254 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 171812 + ... + 171815.

It is an arithmetic number, because the mean of its divisors is an integer number (257721).

2⁶⁸⁷²⁵⁴ is an apocalyptic number.

687254 is a deficient number, since it is larger than the sum of its proper divisors (343630).

687254 is a wasteful number, since it uses less digits than its factorization.

687254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343629.

The product of its digits is 13440, while the sum is 32.

The square root of 687254 is about 829.0078407349. The cubic root of 687254 is about 88.2481802705.

The spelling of 687254 in words is "six hundred eighty-seven thousand, two hundred fifty-four".