681459 has 4 divisors (see below), whose sum is σ = 908616. Its totient is φ = 454304.

The previous prime is 681451. The next prime is 681481. The reversal of 681459 is 954186.

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

It is a cyclic number.

It is not a de Polignac number, because 681459 - 2³ = 681451 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (681451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113574 + ... + 113579.

It is an arithmetic number, because the mean of its divisors is an integer number (227154).

2⁶⁸¹⁴⁵⁹ is an apocalyptic number.

681459 is a deficient number, since it is larger than the sum of its proper divisors (227157).

681459 is a wasteful number, since it uses less digits than its factorization.

681459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227156.

The product of its digits is 8640, while the sum is 33.

The square root of 681459 is about 825.5052998013. The cubic root of 681459 is about 87.9994404234. Note that the first 3 decimals are identical.

The spelling of 681459 in words is "six hundred eighty-one thousand, four hundred fifty-nine".