1105661 has 2 divisors, whose sum is σ = 1105662. Its totient is φ = 1105660.

The previous prime is 1105651. The next prime is 1105669. The reversal of 1105661 is 1665011.

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., 722500 + 383161 = 850^2 + 619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1105661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1105669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552830 + 552831.

It is an arithmetic number, because the mean of its divisors is an integer number (552831).

2^1105661 is an apocalyptic number.

It is an amenable number.

1105661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105661 is an equidigital number, since it uses as much as digits as its factorization.

1105661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1105661 is about 1051.5041607145. The cubic root of 1105661 is about 103.4047915950.

The spelling of 1105661 in words is "one million, one hundred five thousand, six hundred sixty-one".