671587225 has 27 divisors (see below), whose sum is σ = 856391709. Its totient is φ = 522446400.

The previous prime is 671587187. The next prime is 671587271. The reversal of 671587225 is 522785176.

The square root of 671587225 is 25915.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 3674889 + 667912336 = 1917^2 + 25844^2 .

It is not a de Polignac number, because 671587225 - 2¹¹ = 671585177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9199789 + ... + 9199861.

Almost surely, 2^671587225 is an apocalyptic number.

671587225 is the 25915-th square number.

671587225 is the 12958-th centered octagonal number.

It is an amenable number.

671587225 is a deficient number, since it is larger than the sum of its proper divisors (184804484).

671587225 is an frugal number, since it uses more digits than its factorization.

671587225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 149 counting only the distinct ones).

The product of its digits is 235200, while the sum is 43.

The cubic root of 671587225 is about 875.7244503708.

The spelling of 671587225 in words is "six hundred seventy-one million, five hundred eighty-seven thousand, two hundred twenty-five".