1105691 has 2 divisors, whose sum is σ = 1105692. Its totient is φ = 1105690.

The previous prime is 1105669. The next prime is 1105693. The reversal of 1105691 is 1965011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1105691 - 2⁶ = 1105627 is a prime.

Together with 1105693, 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 (1105693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552845 + 552846.

It is an arithmetic number, because the mean of its divisors is an integer number (552846).

2^1105691 is an apocalyptic number.

1105691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105691 is an equidigital number, since it uses as much as digits as its factorization.

1105691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 1105691 is about 1051.5184258966. The cubic root of 1105691 is about 103.4057268171.

The spelling of 1105691 in words is "one million, one hundred five thousand, six hundred ninety-one".