1681115 has 4 divisors (see below), whose sum is σ = 2017344. Its totient is φ = 1344888.

The previous prime is 1681103. The next prime is 1681129. The reversal of 1681115 is 5111861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1681115 - 2⁸ = 1680859 is a prime.

It is a super-2 number, since 2×1681115² = 5652295286450, which contains 22 as substring.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 168107 + ... + 168116.

It is an arithmetic number, because the mean of its divisors is an integer number (504336).

2^1681115 is an apocalyptic number.

1681115 is a deficient number, since it is larger than the sum of its proper divisors (336229).

1681115 is an equidigital number, since it uses as much as digits as its factorization.

1681115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336228.

The product of its digits is 240, while the sum is 23.

The square root of 1681115 is about 1296.5781889265. The cubic root of 1681115 is about 118.9047327351.

Adding to 1681115 its reverse (5111861), we get a palindrome (6792976).

The spelling of 1681115 in words is "one million, six hundred eighty-one thousand, one hundred fifteen".