521000125 has 8 divisors (see below), whose sum is σ = 650208312. Its totient is φ = 416800000.

The previous prime is 521000119. The next prime is 521000141.

521000125 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 69989956 + 451010169 = 8366^2 + 21237^2 .

It is not a de Polignac number, because 521000125 - 2⁵ = 521000093 is a prime.

It is a super-2 number, since 2×521000125² = 542882260500031250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521000099 and 521000108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2083876 + ... + 2084125.

It is an arithmetic number, because the mean of its divisors is an integer number (81276039).

Almost surely, 2^521000125 is an apocalyptic number.

It is an amenable number.

521000125 is a deficient number, since it is larger than the sum of its proper divisors (129208187).

521000125 is an equidigital number, since it uses as much as digits as its factorization.

521000125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168016 (or 4168006 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 521000125 is about 22825.4271592012. The cubic root of 521000125 is about 804.6603636496.

It can be divided in two parts, 521000 and 125, that added together give a palindrome (521125).

The spelling of 521000125 in words is "five hundred twenty-one million, one hundred twenty-five", and thus it is an aban number.