521495125 has 16 divisors (see below), whose sum is σ = 654995952. Its totient is φ = 414523200.

The previous prime is 521495119. The next prime is 521495129. The reversal of 521495125 is 521594125.

It can be written as a sum of positive squares in 8 ways, for example, as 55323844 + 466171281 = 7438^2 + 21591^2 .

It is not a de Polignac number, because 521495125 - 2⁷ = 521494997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521495129) 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, 6339 + ... + 32911.

It is an arithmetic number, because the mean of its divisors is an integer number (40937247).

Almost surely, 2^521495125 is an apocalyptic number.

It is an amenable number.

521495125 is a deficient number, since it is larger than the sum of its proper divisors (133500827).

521495125 is a wasteful number, since it uses less digits than its factorization.

521495125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26745 (or 26735 counting only the distinct ones).

The product of its digits is 18000, while the sum is 34.

The square root of 521495125 is about 22836.2677554805. The cubic root of 521495125 is about 804.9151177812.

The spelling of 521495125 in words is "five hundred twenty-one million, four hundred ninety-five thousand, one hundred twenty-five".