1020112645 has 4 divisors (see below), whose sum is σ = 1224135180. Its totient is φ = 816090112.

The previous prime is 1020112633. The next prime is 1020112651. The reversal of 1020112645 is 5462110201.

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 673817764 + 346294881 = 25958^2 + 18609^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020112645 - 2²⁷ = 885894917 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102011260 + ... + 102011269.

It is an arithmetic number, because the mean of its divisors is an integer number (306033795).

Almost surely, 2^1020112645 is an apocalyptic number.

It is an amenable number.

1020112645 is a deficient number, since it is larger than the sum of its proper divisors (204022535).

1020112645 is an equidigital number, since it uses as much as digits as its factorization.

1020112645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204022534.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1020112645 is about 31939.2023225377. The cubic root of 1020112645 is about 1006.6597640834.

Adding to 1020112645 its reverse (5462110201), we get a palindrome (6482222846).

The spelling of 1020112645 in words is "one billion, twenty million, one hundred twelve thousand, six hundred forty-five".