506505121 has 4 divisors (see below), whose sum is σ = 508607044. Its totient is φ = 504403200.

The previous prime is 506505113. The next prime is 506505161. The reversal of 506505121 is 121505605.

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 223054225 + 283450896 = 14935^2 + 16836^2 .

It is a cyclic number.

It is not a de Polignac number, because 506505121 - 2³ = 506505113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506505161) 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, 1050600 + ... + 1051081.

It is an arithmetic number, because the mean of its divisors is an integer number (127151761).

Almost surely, 2^506505121 is an apocalyptic number.

It is an amenable number.

506505121 is a deficient number, since it is larger than the sum of its proper divisors (2101923).

506505121 is a wasteful number, since it uses less digits than its factorization.

506505121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101922.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 506505121 is about 22505.6686414779. The cubic root of 506505121 is about 797.1277841654.

The spelling of 506505121 in words is "five hundred six million, five hundred five thousand, one hundred twenty-one".