1687925 has 12 divisors (see below), whose sum is σ = 2115936. Its totient is φ = 1335600.

The previous prime is 1687909. The next prime is 1687937. The reversal of 1687925 is 5297861.

It is not a de Polignac number, because 1687925 - 2⁴ = 1687909 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 11 ways as a sum of consecutive naturals, for example, 2360 + ... + 2990.

It is an arithmetic number, because the mean of its divisors is an integer number (176328).

2^1687925 is an apocalyptic number.

It is an amenable number.

1687925 is a deficient number, since it is larger than the sum of its proper divisors (428011).

1687925 is a wasteful number, since it uses less digits than its factorization.

1687925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748 (or 743 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 1687925 is about 1299.2016779546. The cubic root of 1687925 is about 119.0650728060.

The spelling of 1687925 in words is "one million, six hundred eighty-seven thousand, nine hundred twenty-five".