1121488409 has 2 divisors, whose sum is σ = 1121488410. Its totient is φ = 1121488408.

The previous prime is 1121488369. The next prime is 1121488451. The reversal of 1121488409 is 9048841211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 739676809 + 381811600 = 27197^2 + 19540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121488409 - 2¹² = 1121484313 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1121488469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560744204 + 560744205.

It is an arithmetic number, because the mean of its divisors is an integer number (560744205).

Almost surely, 2^1121488409 is an apocalyptic number.

It is an amenable number.

1121488409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121488409 is an equidigital number, since it uses as much as digits as its factorization.

1121488409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 1121488409 is about 33488.6310409966. The cubic root of 1121488409 is about 1038.9586497686.

The spelling of 1121488409 in words is "one billion, one hundred twenty-one million, four hundred eighty-eight thousand, four hundred nine".