1121840171 has 4 divisors (see below), whose sum is σ = 1123585512. Its totient is φ = 1120094832.

The previous prime is 1121840141. The next prime is 1121840173. The reversal of 1121840171 is 1710481211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121840171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121840171.

It is not an unprimeable number, because it can be changed into a prime (1121840173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 871706 + ... + 872991.

It is an arithmetic number, because the mean of its divisors is an integer number (280896378).

Almost surely, 2^1121840171 is an apocalyptic number.

1121840171 is a deficient number, since it is larger than the sum of its proper divisors (1745341).

1121840171 is an equidigital number, since it uses as much as digits as its factorization.

1121840171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745340.

The product of its (nonzero) digits is 448, while the sum is 26.

The square root of 1121840171 is about 33493.8825907060. The cubic root of 1121840171 is about 1039.0672637516.

The spelling of 1121840171 in words is "one billion, one hundred twenty-one million, eight hundred forty thousand, one hundred seventy-one".