1103681 has 4 divisors (see below), whose sum is σ = 1129392. Its totient is φ = 1077972.

The previous prime is 1103639. The next prime is 1103699. The reversal of 1103681 is 1863011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1103681 - 2⁶ = 1103617 is a prime.

It is a super-2 number, since 2×1103681² = 2436223499522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1103611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12791 + ... + 12876.

It is an arithmetic number, because the mean of its divisors is an integer number (282348).

2^1103681 is an apocalyptic number.

It is an amenable number.

1103681 is a deficient number, since it is larger than the sum of its proper divisors (25711).

1103681 is an equidigital number, since it uses as much as digits as its factorization.

1103681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25710.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1103681 is about 1050.5622304271. The cubic root of 1103681 is about 103.3430294983.

Adding to 1103681 its reverse (1863011), we get a palindrome (2966692).

The spelling of 1103681 in words is "one million, one hundred three thousand, six hundred eighty-one".