671257 has 2 divisors, whose sum is σ = 671258. Its totient is φ = 671256.

The previous prime is 671249. The next prime is 671261. The reversal of 671257 is 752176.

671257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 467856 + 203401 = 684^2 + 451^2 .

It is a cyclic number.

It is not a de Polignac number, because 671257 - 2³ = 671249 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (671287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335628 + 335629.

It is an arithmetic number, because the mean of its divisors is an integer number (335629).

2⁶⁷¹²⁵⁷ is an apocalyptic number.

It is an amenable number.

671257 is a deficient number, since it is larger than the sum of its proper divisors (1).

671257 is an equidigital number, since it uses as much as digits as its factorization.

671257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2940, while the sum is 28.

The square root of 671257 is about 819.3027523449. The cubic root of 671257 is about 87.5580893184.

The spelling of 671257 in words is "six hundred seventy-one thousand, two hundred fifty-seven".