1122791 has 4 divisors (see below), whose sum is σ = 1171632. Its totient is φ = 1073952.

The previous prime is 1122761. The next prime is 1122811. The reversal of 1122791 is 1972211.

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 1122791 - 2¹⁴ = 1106407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 48817 = 1122791 / (1 + 1 + 2 + 2 + 7 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122701) 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, 24386 + ... + 24431.

It is an arithmetic number, because the mean of its divisors is an integer number (292908).

2^1122791 is an apocalyptic number.

1122791 is a deficient number, since it is larger than the sum of its proper divisors (48841).

1122791 is an equidigital number, since it uses as much as digits as its factorization.

1122791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48840.

The product of its digits is 252, while the sum is 23.

The square root of 1122791 is about 1059.6183275123. The cubic root of 1122791 is about 103.9360738800.

The spelling of 1122791 in words is "one million, one hundred twenty-two thousand, seven hundred ninety-one".