1681086 has 16 divisors (see below), whose sum is σ = 3667968. Its totient is φ = 509400.

The previous prime is 1681073. The next prime is 1681091. The reversal of 1681086 is 6801861.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12670 + ... + 12801.

It is an arithmetic number, because the mean of its divisors is an integer number (229248).

2^1681086 is an apocalyptic number.

1681086 is an abundant number, since it is smaller than the sum of its proper divisors (1986882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1681086 is a wasteful number, since it uses less digits than its factorization.

1681086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25487.

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

The square root of 1681086 is about 1296.5670055959. The cubic root of 1681086 is about 118.9040490109.

The spelling of 1681086 in words is "one million, six hundred eighty-one thousand, eighty-six".