671625 has 32 divisors (see below), whose sum is σ = 1248000. Its totient is φ = 356400.

The previous prime is 671609. The next prime is 671633. The reversal of 671625 is 526176.

It is not a de Polignac number, because 671625 - 2⁴ = 671609 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 671625.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3276 + ... + 3474.

It is an arithmetic number, because the mean of its divisors is an integer number (39000).

2⁶⁷¹⁶²⁵ is an apocalyptic number.

It is an amenable number.

671625 is a deficient number, since it is larger than the sum of its proper divisors (576375).

671625 is a wasteful number, since it uses less digits than its factorization.

671625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 207 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 671625 is about 819.5273027789. The cubic root of 671625 is about 87.5740869122.

It can be divided in two parts, 671 and 625, that added together give a 4-th power (1296 = 6⁴).

The spelling of 671625 in words is "six hundred seventy-one thousand, six hundred twenty-five".