680146 has 4 divisors (see below), whose sum is σ = 1020222. Its totient is φ = 340072.

The previous prime is 680129. The next prime is 680159. The reversal of 680146 is 641086.

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

It can be written as a sum of positive squares in only one way, i.e., 511225 + 168921 = 715^2 + 411^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 680146.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170035 + ... + 170038.

2⁶⁸⁰¹⁴⁶ is an apocalyptic number.

680146 is a deficient number, since it is larger than the sum of its proper divisors (340076).

680146 is a wasteful number, since it uses less digits than its factorization.

680146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340075.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 680146 is about 824.7096458754. The cubic root of 680146 is about 87.9428864941.

Subtracting from 680146 its reverse (641086), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 680146 in words is "six hundred eighty thousand, one hundred forty-six".