1121839956 has 30 divisors (see below), whose sum is σ = 2932712090. Its totient is φ = 373946544.

The previous prime is 1121839951. The next prime is 1121839967. The reversal of 1121839956 is 6599381211.

It can be written as a sum of positive squares in only one way, i.e., 1085043600 + 36796356 = 32940^2 + 6066^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121839951) 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 9 ways as a sum of consecutive naturals, for example, 1730911 + ... + 1731558.

Almost surely, 2^1121839956 is an apocalyptic number.

It is an amenable number.

1121839956 is an abundant number, since it is smaller than the sum of its proper divisors (1810872134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121839956 is a wasteful number, since it uses less digits than its factorization.

1121839956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3462485 (or 3462474 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 1121839956 is about 33493.8793811646. The cubic root of 1121839956 is about 1039.0671973727.

The spelling of 1121839956 in words is "one billion, one hundred twenty-one million, eight hundred thirty-nine thousand, nine hundred fifty-six".