1020234505 has 4 divisors (see below), whose sum is σ = 1224281412. Its totient is φ = 816187600.

The previous prime is 1020234503. The next prime is 1020234511. The reversal of 1020234505 is 5054320201.

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 281971264 + 738263241 = 16792^2 + 27171^2 .

It is not a de Polignac number, because 1020234505 - 2¹ = 1020234503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020234503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102023446 + ... + 102023455.

It is an arithmetic number, because the mean of its divisors is an integer number (306070353).

Almost surely, 2^1020234505 is an apocalyptic number.

It is an amenable number.

1020234505 is a deficient number, since it is larger than the sum of its proper divisors (204046907).

1020234505 is an equidigital number, since it uses as much as digits as its factorization.

1020234505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204046906.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1020234505 is about 31941.1099525361. The cubic root of 1020234505 is about 1006.6998468053.

Adding to 1020234505 its reverse (5054320201), we get a palindrome (6074554706).

The spelling of 1020234505 in words is "one billion, twenty million, two hundred thirty-four thousand, five hundred five".