1121404555 has 8 divisors (see below), whose sum is σ = 1346306832. Its totient is φ = 896709408.

The previous prime is 1121404549. The next prime is 1121404577. The reversal of 1121404555 is 5554041211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121404555 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39609 + ... + 61738.

It is an arithmetic number, because the mean of its divisors is an integer number (168288354).

Almost surely, 2^1121404555 is an apocalyptic number.

1121404555 is a deficient number, since it is larger than the sum of its proper divisors (224902277).

1121404555 is a wasteful number, since it uses less digits than its factorization.

1121404555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103565.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 1121404555 is about 33487.3790404684. The cubic root of 1121404555 is about 1038.9327547142.

Adding to 1121404555 its reverse (5554041211), we get a palindrome (6675445766).

The spelling of 1121404555 in words is "one billion, one hundred twenty-one million, four hundred four thousand, five hundred fifty-five".