520001172 has 36 divisors (see below), whose sum is σ = 1315253940. Its totient is φ = 173227392.

The previous prime is 520001171. The next prime is 520001201. The reversal of 520001172 is 271100025.

It can be written as a sum of positive squares in 2 ways, for example, as 172029456 + 347971716 = 13116^2 + 18654^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520001171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74154 + ... + 80862.

Almost surely, 2^520001172 is an apocalyptic number.

It is an amenable number.

520001172 is an abundant number, since it is smaller than the sum of its proper divisors (795252768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520001172 is a wasteful number, since it uses less digits than its factorization.

520001172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8872 (or 8867 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 520001172 is about 22803.5341997682. The cubic root of 520001172 is about 804.1457558572.

Adding to 520001172 its reverse (271100025), we get a palindrome (791101197).

The spelling of 520001172 in words is "five hundred twenty million, one thousand, one hundred seventy-two".