681215 has 8 divisors (see below), whose sum is σ = 837648. Its totient is φ = 531520.

The previous prime is 681179. The next prime is 681221. The reversal of 681215 is 512186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 681215 - 2⁶ = 681151 is a prime.

It is a Duffinian number.

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 681215.

It is an unprimeable number.

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, 1457 + ... + 1866.

It is an arithmetic number, because the mean of its divisors is an integer number (104706).

2⁶⁸¹²¹⁵ is an apocalyptic number.

681215 is a deficient number, since it is larger than the sum of its proper divisors (156433).

681215 is a wasteful number, since it uses less digits than its factorization.

681215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3369.

The product of its digits is 480, while the sum is 23.

The square root of 681215 is about 825.3574983000. The cubic root of 681215 is about 87.9889362813.

The spelling of 681215 in words is "six hundred eighty-one thousand, two hundred fifteen".