671401 has 2 divisors, whose sum is σ = 671402. Its totient is φ = 671400.

The previous prime is 671383. The next prime is 671417. The reversal of 671401 is 104176.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 608400 + 63001 = 780^2 + 251^2 .

It is a cyclic number.

It is not a de Polignac number, because 671401 - 2⁵ = 671369 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671431) 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 as a sum of consecutive naturals, namely, 335700 + 335701.

It is an arithmetic number, because the mean of its divisors is an integer number (335701).

2⁶⁷¹⁴⁰¹ is an apocalyptic number.

It is an amenable number.

671401 is a deficient number, since it is larger than the sum of its proper divisors (1).

671401 is an equidigital number, since it uses as much as digits as its factorization.

671401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 671401 is about 819.3906272347. The cubic root of 671401 is about 87.5643499426.

Adding to 671401 its reverse (104176), we get a palindrome (775577).

The spelling of 671401 in words is "six hundred seventy-one thousand, four hundred one".