1121536705 has 4 divisors (see below), whose sum is σ = 1345844052. Its totient is φ = 897229360.

The previous prime is 1121536697. The next prime is 1121536709. The reversal of 1121536705 is 5076351211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5076351211 = 5419 ⋅936769.

It can be written as a sum of positive squares in 2 ways, for example, as 204718864 + 916817841 = 14308^2 + 30279^2 .

It is not a de Polignac number, because 1121536705 - 2³ = 1121536697 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121536709) 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 in 3 ways as a sum of consecutive naturals, for example, 112153666 + ... + 112153675.

It is an arithmetic number, because the mean of its divisors is an integer number (336461013).

Almost surely, 2^1121536705 is an apocalyptic number.

It is an amenable number.

1121536705 is a deficient number, since it is larger than the sum of its proper divisors (224307347).

1121536705 is an equidigital number, since it uses as much as digits as its factorization.

1121536705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224307346.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 1121536705 is about 33489.3521137689. The cubic root of 1121536705 is about 1038.9735635285.

Adding to 1121536705 its reverse (5076351211), we get a palindrome (6197887916).

The spelling of 1121536705 in words is "one billion, one hundred twenty-one million, five hundred thirty-six thousand, seven hundred five".