1122787 has 4 divisors (see below), whose sum is σ = 1127920. Its totient is φ = 1117656.

The previous prime is 1122761. The next prime is 1122811. The reversal of 1122787 is 7872211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7872211 = 283 ⋅27817.

It is a cyclic number.

It is not a de Polignac number, because 1122787 - 2⁷ = 1122659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1122757) 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, 2223 + ... + 2680.

It is an arithmetic number, because the mean of its divisors is an integer number (281980).

2^1122787 is an apocalyptic number.

1122787 is a deficient number, since it is larger than the sum of its proper divisors (5133).

1122787 is an equidigital number, since it uses as much as digits as its factorization.

1122787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5132.

The product of its digits is 1568, while the sum is 28.

The square root of 1122787 is about 1059.6164400386. The cubic root of 1122787 is about 103.9359504540.

Adding to 1122787 its reverse (7872211), we get a palindrome (8994998).

The spelling of 1122787 in words is "one million, one hundred twenty-two thousand, seven hundred eighty-seven".