472128505 has 16 divisors (see below), whose sum is σ = 611205264. Its totient is φ = 348774400.

The previous prime is 472128493. The next prime is 472128509. The reversal of 472128505 is 505821274.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 82737216 + 389391289 = 9096^2 + 19733^2 .

It is a de Polignac number, because none of the positive numbers 2^k-472128505 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (472128509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47896 + ... + 56905.

It is an arithmetic number, because the mean of its divisors is an integer number (38200329).

Almost surely, 2^472128505 is an apocalyptic number.

It is an amenable number.

472128505 is a deficient number, since it is larger than the sum of its proper divisors (139076759).

472128505 is a wasteful number, since it uses less digits than its factorization.

472128505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104876.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 472128505 is about 21728.5182421628. The cubic root of 472128505 is about 778.6699362976.

Adding to 472128505 its reverse (505821274), we get a palindrome (977949779).

The spelling of 472128505 in words is "four hundred seventy-two million, one hundred twenty-eight thousand, five hundred five".