1020045005 has 24 divisors (see below), whose sum is σ = 1430196120. Its totient is φ = 696366720.

The previous prime is 1020044981. The next prime is 1020045007. The reversal of 1020045005 is 5005400201.

It can be written as a sum of positive squares in 4 ways, for example, as 588984361 + 431060644 = 24269^2 + 20762^2 .

It is not a de Polignac number, because 1020045005 - 2¹⁶ = 1019979469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020045007) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 47015 + ... + 65195.

It is an arithmetic number, because the mean of its divisors is an integer number (59591505).

Almost surely, 2^1020045005 is an apocalyptic number.

It is an amenable number.

1020045005 is a deficient number, since it is larger than the sum of its proper divisors (410151115).

1020045005 is a wasteful number, since it uses less digits than its factorization.

1020045005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18429 (or 18422 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 1020045005 is about 31938.1434181763. The cubic root of 1020045005 is about 1006.6375142623.

Adding to 1020045005 its reverse (5005400201), we get a palindrome (6025445206).

The spelling of 1020045005 in words is "one billion, twenty million, forty-five thousand, five".