671213 has 4 divisors (see below), whose sum is σ = 706560. Its totient is φ = 635868.

The previous prime is 671201. The next prime is 671219. The reversal of 671213 is 312176.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 671213 - 2¹⁸ = 409069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17645 + ... + 17682.

It is an arithmetic number, because the mean of its divisors is an integer number (176640).

2⁶⁷¹²¹³ is an apocalyptic number.

It is an amenable number.

671213 is a deficient number, since it is larger than the sum of its proper divisors (35347).

671213 is a wasteful number, since it uses less digits than its factorization.

671213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35346.

The product of its digits is 252, while the sum is 20.

The square root of 671213 is about 819.2758998042. The cubic root of 671213 is about 87.5561761713.

Adding to 671213 its reverse (312176), we get a palindrome (983389).

The spelling of 671213 in words is "six hundred seventy-one thousand, two hundred thirteen".