1688601 has 16 divisors (see below), whose sum is σ = 2367488. Its totient is φ = 1069200.

The previous prime is 1688579. The next prime is 1688623. The reversal of 1688601 is 1068861.

It is an interprime number because it is at equal distance from previous prime (1688579) and next prime (1688623).

It is not a de Polignac number, because 1688601 - 2¹⁸ = 1426457 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1688651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6096 + ... + 6366.

It is an arithmetic number, because the mean of its divisors is an integer number (147968).

2^1688601 is an apocalyptic number.

It is an amenable number.

1688601 is a deficient number, since it is larger than the sum of its proper divisors (678887).

1688601 is a wasteful number, since it uses less digits than its factorization.

1688601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1688601 is about 1299.4618116744. The cubic root of 1688601 is about 119.0809655435.

It can be divided in two parts, 168860 and 1, that added together give a palindrome (168861).

The spelling of 1688601 in words is "one million, six hundred eighty-eight thousand, six hundred one".