1121405773 has 4 divisors (see below), whose sum is σ = 1121478300. Its totient is φ = 1121333248.

The previous prime is 1121405771. The next prime is 1121405777. The reversal of 1121405773 is 3775041211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3775041211 = 5897 ⋅640163.

It can be written as a sum of positive squares in 2 ways, for example, as 779414724 + 341991049 = 27918^2 + 18493^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121405773 - 2¹ = 1121405771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121405771) 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, 2740 + ... + 47437.

It is an arithmetic number, because the mean of its divisors is an integer number (280369575).

Almost surely, 2^1121405773 is an apocalyptic number.

It is an amenable number.

1121405773 is a deficient number, since it is larger than the sum of its proper divisors (72527).

1121405773 is an equidigital number, since it uses as much as digits as its factorization.

1121405773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72526.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 1121405773 is about 33487.3972264194. The cubic root of 1121405773 is about 1038.9331308555.

Adding to 1121405773 its reverse (3775041211), we get a palindrome (4896446984).

The spelling of 1121405773 in words is "one billion, one hundred twenty-one million, four hundred five thousand, seven hundred seventy-three".