1105999 has 2 divisors, whose sum is σ = 1106000. Its totient is φ = 1105998.

The previous prime is 1105997. The next prime is 1106029. The reversal of 1105999 is 9995011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1105999 - 2¹ = 1105997 is a prime.

Together with 1105997, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1105997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552999 + 553000.

It is an arithmetic number, because the mean of its divisors is an integer number (553000).

2^1105999 is an apocalyptic number.

1105999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105999 is an equidigital number, since it uses as much as digits as its factorization.

1105999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3645, while the sum is 34.

The square root of 1105999 is about 1051.6648705743. The cubic root of 1105999 is about 103.4153274521.

The spelling of 1105999 in words is "one million, one hundred five thousand, nine hundred ninety-nine".