1100681 has 2 divisors, whose sum is σ = 1100682. Its totient is φ = 1100680.

The previous prime is 1100653. The next prime is 1100683. The reversal of 1100681 is 1860011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 781456 + 319225 = 884^2 + 565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100681 - 2¹⁴ = 1084297 is a prime.

It is a super-2 number, since 2×1100681² = 2422997327522, which contains 22 as substring.

Together with 1100683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1100683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550340 + 550341.

It is an arithmetic number, because the mean of its divisors is an integer number (550341).

2^1100681 is an apocalyptic number.

It is an amenable number.

1100681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100681 is an equidigital number, since it uses as much as digits as its factorization.

1100681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 1100681 is about 1049.1334519498. The cubic root of 1100681 is about 103.2493096589.

Adding to 1100681 its reverse (1860011), we get a palindrome (2960692).

The spelling of 1100681 in words is "one million, one hundred thousand, six hundred eighty-one".