1681113 has 24 divisors (see below), whose sum is σ = 2731072. Its totient is φ = 900864.

The previous prime is 1681103. The next prime is 1681129. The reversal of 1681113 is 3111861.

It is not a de Polignac number, because 1681113 - 2¹⁰ = 1680089 is a prime.

It is a super-2 number, since 2×1681113² = 5652281837538, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1681113.

It is not an unprimeable number, because it can be changed into a prime (1681103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5931 + ... + 6207.

2^1681113 is an apocalyptic number.

It is an amenable number.

1681113 is a deficient number, since it is larger than the sum of its proper divisors (1049959).

1681113 is a wasteful number, since it uses less digits than its factorization.

1681113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 304 counting only the distinct ones).

The product of its digits is 144, while the sum is 21.

The square root of 1681113 is about 1296.5774176654. The cubic root of 1681113 is about 118.9046855820.

Adding to 1681113 its reverse (3111861), we get a palindrome (4792974).

The spelling of 1681113 in words is "one million, six hundred eighty-one thousand, one hundred thirteen".