671245 has 16 divisors (see below), whose sum is σ = 874800. Its totient is φ = 492544.

The previous prime is 671233. The next prime is 671249. The reversal of 671245 is 542176.

671245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 484 + 670761 = 22^2 + 819^2 .

It is a cyclic number.

It is not a de Polignac number, because 671245 - 2¹³ = 663053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4431 + ... + 4579.

It is an arithmetic number, because the mean of its divisors is an integer number (54675).

2⁶⁷¹²⁴⁵ is an apocalyptic number.

It is an amenable number.

671245 is a deficient number, since it is larger than the sum of its proper divisors (203555).

671245 is a wasteful number, since it uses less digits than its factorization.

671245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224.

The product of its digits is 1680, while the sum is 25.

The square root of 671245 is about 819.2954290120. The cubic root of 671245 is about 87.5575675593.

The spelling of 671245 in words is "six hundred seventy-one thousand, two hundred forty-five".