680451 has 4 divisors (see below), whose sum is σ = 907272. Its totient is φ = 453632.

The previous prime is 680443. The next prime is 680453. The reversal of 680451 is 154086.

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 680451 - 2³ = 680443 is a prime.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (680453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113406 + ... + 113411.

It is an arithmetic number, because the mean of its divisors is an integer number (226818).

2⁶⁸⁰⁴⁵¹ is an apocalyptic number.

680451 is a deficient number, since it is larger than the sum of its proper divisors (226821).

680451 is a wasteful number, since it uses less digits than its factorization.

680451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226820.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 680451 is about 824.8945387139. The cubic root of 680451 is about 87.9560300309.

The spelling of 680451 in words is "six hundred eighty thousand, four hundred fifty-one".