1681144 has 8 divisors (see below), whose sum is σ = 3152160. Its totient is φ = 840568.

The previous prime is 1681129. The next prime is 1681151. The reversal of 1681144 is 4411861.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105064 + ... + 105079.

It is an arithmetic number, because the mean of its divisors is an integer number (394020).

2^1681144 is an apocalyptic number.

It is an amenable number.

1681144 is a deficient number, since it is larger than the sum of its proper divisors (1471016).

1681144 is a wasteful number, since it uses less digits than its factorization.

1681144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210149 (or 210145 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

The square root of 1681144 is about 1296.5893721607. The cubic root of 1681144 is about 118.9054164515.

It can be divided in two parts, 1681 and 144, that multiplied together give a square (242064 = 492²).

The spelling of 1681144 in words is "one million, six hundred eighty-one thousand, one hundred forty-four".