1121184457 has 4 divisors (see below), whose sum is σ = 1159846020. Its totient is φ = 1082522896.

The previous prime is 1121184437. The next prime is 1121184461. The reversal of 1121184457 is 7544811211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 458430921 + 662753536 = 21411^2 + 25744^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121184457 - 2¹⁹ = 1120660169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121184437) 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, 19330738 + ... + 19330795.

It is an arithmetic number, because the mean of its divisors is an integer number (289961505).

Almost surely, 2^1121184457 is an apocalyptic number.

It is an amenable number.

1121184457 is a deficient number, since it is larger than the sum of its proper divisors (38661563).

1121184457 is an equidigital number, since it uses as much as digits as its factorization.

1121184457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38661562.

The product of its digits is 8960, while the sum is 34.

The square root of 1121184457 is about 33484.0925963360. The cubic root of 1121184457 is about 1038.8647798452.

Adding to 1121184457 its reverse (7544811211), we get a palindrome (8665995668).

The spelling of 1121184457 in words is "one billion, one hundred twenty-one million, one hundred eighty-four thousand, four hundred fifty-seven".