1681596 has 36 divisors (see below), whose sum is σ = 4858672. Its totient is φ = 480384.

The previous prime is 1681591. The next prime is 1681597. The reversal of 1681596 is 6951861.

1681596 is a `hidden beast` number, since 1 + 68 + 1 + 596 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1681596.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681591) 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, 3085 + ... + 3588.

2^1681596 is an apocalyptic number.

It is an amenable number.

1681596 is an abundant number, since it is smaller than the sum of its proper divisors (3177076).

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

1681596 is a wasteful number, since it uses less digits than its factorization.

1681596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6690 (or 6685 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1681596 is about 1296.7636638956. The cubic root of 1681596 is about 118.9160719797.

It can be divided in two parts, 168 and 1596, that added together give a square (1764 = 42²).

The spelling of 1681596 in words is "one million, six hundred eighty-one thousand, five hundred ninety-six".