1671925 has 6 divisors (see below), whose sum is σ = 2073218. Its totient is φ = 1337520.

The previous prime is 1671907. The next prime is 1671941. The reversal of 1671925 is 5291761.

It can be written as a sum of positive squares in 3 ways, for example, as 10404 + 1661521 = 102^2 + 1289^2 .

It is not a de Polignac number, because 1671925 - 2¹⁹ = 1147637 is a prime.

It is a Duffinian number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 33414 + ... + 33463.

2^1671925 is an apocalyptic number.

It is an amenable number.

1671925 is a deficient number, since it is larger than the sum of its proper divisors (401293).

1671925 is an equidigital number, since it uses as much as digits as its factorization.

1671925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66887 (or 66882 counting only the distinct ones).

The product of its digits is 3780, while the sum is 31.

The square root of 1671925 is about 1293.0293886838. The cubic root of 1671925 is about 118.6876681187.

The spelling of 1671925 in words is "one million, six hundred seventy-one thousand, nine hundred twenty-five".