1120000645 has 4 divisors (see below), whose sum is σ = 1344000780. Its totient is φ = 896000512.

The previous prime is 1120000639. The next prime is 1120000699. The reversal of 1120000645 is 5460000211.

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 326958724 + 793041921 = 18082^2 + 28161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1120000645 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 112000060 + ... + 112000069.

It is an arithmetic number, because the mean of its divisors is an integer number (336000195).

Almost surely, 2^1120000645 is an apocalyptic number.

It is an amenable number.

1120000645 is a deficient number, since it is larger than the sum of its proper divisors (224000135).

1120000645 is an equidigital number, since it uses as much as digits as its factorization.

1120000645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224000134.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1120000645 is about 33466.4106978923. The cubic root of 1120000645 is about 1038.4990197249.

Adding to 1120000645 its reverse (5460000211), we get a palindrome (6580000856).

The spelling of 1120000645 in words is "one billion, one hundred twenty million, six hundred forty-five", and thus it is an aban number.