1121771 has 4 divisors (see below), whose sum is σ = 1282032. Its totient is φ = 961512.

The previous prime is 1121737. The next prime is 1121819. The reversal of 1121771 is 1771211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1771211 = 13 ⋅136247.

It is a cyclic number.

It is not a de Polignac number, because 1121771 - 2⁶ = 1121707 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121671) 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, 80120 + ... + 80133.

It is an arithmetic number, because the mean of its divisors is an integer number (320508).

2^1121771 is an apocalyptic number.

1121771 is a deficient number, since it is larger than the sum of its proper divisors (160261).

1121771 is an equidigital number, since it uses as much as digits as its factorization.

1121771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160260.

The product of its digits is 98, while the sum is 20.

The square root of 1121771 is about 1059.1369127738. The cubic root of 1121771 is about 103.9045907531.

Adding to 1121771 its reverse (1771211), we get a palindrome (2892982).

The spelling of 1121771 in words is "one million, one hundred twenty-one thousand, seven hundred seventy-one".