671245172 has 12 divisors (see below), whose sum is σ = 1265039076. Its totient is φ = 309805440.

The previous prime is 671245171. The next prime is 671245189. The reversal of 671245172 is 271542176.

It can be written as a sum of positive squares in 2 ways, for example, as 53523856 + 617721316 = 7316^2 + 24854^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671245171) 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, 6454229 + ... + 6454332.

It is an arithmetic number, because the mean of its divisors is an integer number (105419923).

Almost surely, 2^671245172 is an apocalyptic number.

It is an amenable number.

671245172 is a deficient number, since it is larger than the sum of its proper divisors (593793904).

671245172 is a wasteful number, since it uses less digits than its factorization.

671245172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12908578 (or 12908576 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 671245172 is about 25908.3996418150. The cubic root of 671245172 is about 875.5757503790.

The spelling of 671245172 in words is "six hundred seventy-one million, two hundred forty-five thousand, one hundred seventy-two".