671290 has 8 divisors (see below), whose sum is σ = 1208340. Its totient is φ = 268512.

The previous prime is 671287. The next prime is 671299. The reversal of 671290 is 92176.

671290 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 2 ways, for example, as 670761 + 529 = 819^2 + 23^2 .

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

It is not an unprimeable number, because it can be changed into a prime (671299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33555 + ... + 33574.

2⁶⁷¹²⁹⁰ is an apocalyptic number.

671290 is a deficient number, since it is larger than the sum of its proper divisors (537050).

671290 is a wasteful number, since it uses less digits than its factorization.

671290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67136.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 671290 is about 819.3228911729. The cubic root of 671290 is about 87.5595241239.

It can be divided in two parts, 671 and 290, that added together give a square (961 = 31²).

The spelling of 671290 in words is "six hundred seventy-one thousand, two hundred ninety".