671266 has 4 divisors (see below), whose sum is σ = 1006902. Its totient is φ = 335632.

The previous prime is 671261. The next prime is 671269. The reversal of 671266 is 662176.

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., 395641 + 275625 = 629^2 + 525^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (671261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167815 + ... + 167818.

2⁶⁷¹²⁶⁶ is an apocalyptic number.

671266 is a deficient number, since it is larger than the sum of its proper divisors (335636).

671266 is a wasteful number, since it uses less digits than its factorization.

671266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335635.

The product of its digits is 3024, while the sum is 28.

The square root of 671266 is about 819.3082448017. The cubic root of 671266 is about 87.5584806336.

The spelling of 671266 in words is "six hundred seventy-one thousand, two hundred sixty-six".