1020124505 has 4 divisors (see below), whose sum is σ = 1224149412. Its totient is φ = 816099600.

The previous prime is 1020124493. The next prime is 1020124537. The reversal of 1020124505 is 5054210201.

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 121264144 + 898860361 = 11012^2 + 29981^2 .

It is not a de Polignac number, because 1020124505 - 2⁸ = 1020124249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 102012446 + ... + 102012455.

It is an arithmetic number, because the mean of its divisors is an integer number (306037353).

Almost surely, 2^1020124505 is an apocalyptic number.

It is an amenable number.

1020124505 is a deficient number, since it is larger than the sum of its proper divisors (204024907).

1020124505 is an equidigital number, since it uses as much as digits as its factorization.

1020124505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204024906.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1020124505 is about 31939.3879872486. The cubic root of 1020124505 is about 1006.6636652665.

Adding to 1020124505 its reverse (5054210201), we get a palindrome (6074334706).

The spelling of 1020124505 in words is "one billion, twenty million, one hundred twenty-four thousand, five hundred five".