671925 has 36 divisors (see below), whose sum is σ = 1218176. Its totient is φ = 326400.

The previous prime is 671921. The next prime is 671933. The reversal of 671925 is 529176.

It is not a de Polignac number, because 671925 - 2² = 671921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 671892 and 671901.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 671925.

It is not an unprimeable number, because it can be changed into a prime (671921) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21660 + ... + 21690.

2⁶⁷¹⁹²⁵ is an apocalyptic number.

It is an amenable number.

671925 is a deficient number, since it is larger than the sum of its proper divisors (546251).

671925 is a wasteful number, since it uses less digits than its factorization.

671925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 56 counting only the distinct ones).

The product of its digits is 3780, while the sum is 30.

The square root of 671925 is about 819.7103146844. The cubic root of 671925 is about 87.5871241057.

It can be divided in two parts, 671 and 925, that added together give a triangular number (1596 = T₅₆).

The spelling of 671925 in words is "six hundred seventy-one thousand, nine hundred twenty-five".