1688025 has 24 divisors (see below), whose sum is σ = 2839104. Its totient is φ = 884800.

The previous prime is 1687999. The next prime is 1688041. The reversal of 1688025 is 5208861.

It is not a de Polignac number, because 1688025 - 2¹¹ = 1685977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1687983 and 1688001.

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 23 ways as a sum of consecutive naturals, for example, 5167 + ... + 5483.

It is an arithmetic number, because the mean of its divisors is an integer number (118296).

2^1688025 is an apocalyptic number.

1688025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1688025 is a deficient number, since it is larger than the sum of its proper divisors (1151079).

1688025 is a wasteful number, since it uses less digits than its factorization.

1688025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 1688025 is about 1299.2401625566. The cubic root of 1688025 is about 119.0674240701.

The spelling of 1688025 in words is "one million, six hundred eighty-eight thousand, twenty-five".