1121435505 has 12 divisors (see below), whose sum is σ = 1943821620. Its totient is φ = 598098912.

The previous prime is 1121435503. The next prime is 1121435507. The reversal of 1121435505 is 5055341211.

1121435505 is a `hidden beast` number, since 1 + 12 + 143 + 5 + 505 = 666.

It is an interprime number because it is at equal distance from previous prime (1121435503) and next prime (1121435507).

It can be written as a sum of positive squares in 2 ways, for example, as 349540416 + 771895089 = 18696^2 + 27783^2 .

It is not a de Polignac number, because 1121435505 - 2¹ = 1121435503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121435501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12460350 + ... + 12460439.

It is an arithmetic number, because the mean of its divisors is an integer number (161985135).

Almost surely, 2^1121435505 is an apocalyptic number.

1121435505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1121435505 is a deficient number, since it is larger than the sum of its proper divisors (822386115).

1121435505 is a wasteful number, since it uses less digits than its factorization.

1121435505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24920800 (or 24920797 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1121435505 is about 33487.8411516777. The cubic root of 1121435505 is about 1038.9423125711.

Adding to 1121435505 its reverse (5055341211), we get a palindrome (6176776716).

The spelling of 1121435505 in words is "one billion, one hundred twenty-one million, four hundred thirty-five thousand, five hundred five".