1120661 has 2 divisors, whose sum is σ = 1120662. Its totient is φ = 1120660.

The previous prime is 1120649. The next prime is 1120663. The reversal of 1120661 is 1660211.

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 + 398161 = 850^2 + 631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1120661 is a prime.

Together with 1120663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1120663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560330 + 560331.

It is an arithmetic number, because the mean of its divisors is an integer number (560331).

2^1120661 is an apocalyptic number.

It is an amenable number.

1120661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1120661 is an equidigital number, since it uses as much as digits as its factorization.

1120661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1120661 is about 1058.6127715081. The cubic root of 1120661 is about 103.8703080109.

Adding to 1120661 its reverse (1660211), we get a palindrome (2780872).

The spelling of 1120661 in words is "one million, one hundred twenty thousand, six hundred sixty-one".