1686041 has 12 divisors (see below), whose sum is σ = 2065680. Its totient is φ = 1368360.

The previous prime is 1686029. The next prime is 1686049. The reversal of 1686041 is 1406861.

It is not a de Polignac number, because 1686041 - 2⁶ = 1685977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1686041.

It is not an unprimeable number, because it can be changed into a prime (1686049) by changing a digit.

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, 26 + ... + 1836.

It is an arithmetic number, because the mean of its divisors is an integer number (172140).

2^1686041 is an apocalyptic number.

It is an amenable number.

1686041 is a deficient number, since it is larger than the sum of its proper divisors (379639).

1686041 is a wasteful number, since it uses less digits than its factorization.

1686041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844 (or 1837 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1686041 is about 1298.4764148801. The cubic root of 1686041 is about 119.0207576246.

The spelling of 1686041 in words is "one million, six hundred eighty-six thousand, forty-one".