1121791 has 12 divisors (see below), whose sum is σ = 1259776. Its totient is φ = 997920.

The previous prime is 1121737. The next prime is 1121819. The reversal of 1121791 is 1971211.

It is not a de Polignac number, because 1121791 - 2¹³ = 1113599 is a prime.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

1121791 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8770 + ... + 8896.

2^1121791 is an apocalyptic number.

1121791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1121791 is a deficient number, since it is larger than the sum of its proper divisors (137985).

1121791 is a wasteful number, since it uses less digits than its factorization.

1121791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 211 counting only the distinct ones).

The product of its digits is 126, while the sum is 22.

The square root of 1121791 is about 1059.1463543817. The cubic root of 1121791 is about 103.9052082527.

The spelling of 1121791 in words is "one million, one hundred twenty-one thousand, seven hundred ninety-one".