1122779 has 4 divisors (see below), whose sum is σ = 1283184. Its totient is φ = 962376.

The previous prime is 1122761. The next prime is 1122811. The reversal of 1122779 is 9772211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1122779 - 2²⁰ = 74203 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1122739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80192 + ... + 80205.

It is an arithmetic number, because the mean of its divisors is an integer number (320796).

2^1122779 is an apocalyptic number.

1122779 is a deficient number, since it is larger than the sum of its proper divisors (160405).

1122779 is an equidigital number, since it uses as much as digits as its factorization.

1122779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160404.

The product of its digits is 1764, while the sum is 29.

The square root of 1122779 is about 1059.6126650810. The cubic root of 1122779 is about 103.9357036011.

The spelling of 1122779 in words is "one million, one hundred twenty-two thousand, seven hundred seventy-nine".