681238 has 4 divisors (see below), whose sum is σ = 1021860. Its totient is φ = 340618.

The previous prime is 681229. The next prime is 681251. The reversal of 681238 is 832186.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170308 + ... + 170311.

It is an arithmetic number, because the mean of its divisors is an integer number (255465).

2⁶⁸¹²³⁸ is an apocalyptic number.

681238 is a deficient number, since it is larger than the sum of its proper divisors (340622).

681238 is a wasteful number, since it uses less digits than its factorization.

681238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340621.

The product of its digits is 2304, while the sum is 28.

The square root of 681238 is about 825.3714315386. The cubic root of 681238 is about 87.9899265329.

It can be divided in two parts, 681 and 238, that added together give a palindrome (919).

The spelling of 681238 in words is "six hundred eighty-one thousand, two hundred thirty-eight".