528494121 has 27 divisors (see below), whose sum is σ = 781218711. Its totient is φ = 344283264.

The previous prime is 528494119. The next prime is 528494137. The reversal of 528494121 is 121494825.

The square root of 528494121 is 22989.

It is a perfect power (a square), and thus also a powerful number.

528494121 is a `hidden beast` number, since 528 + 4 + 9 + 4 + 121 = 666.

It can be written as a sum of positive squares in only one way, i.e., 237314025 + 291180096 = 15405^2 + 17064^2 .

It is not a de Polignac number, because 528494121 - 2¹ = 528494119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (528494171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5448345 + ... + 5448441.

Almost surely, 2^528494121 is an apocalyptic number.

528494121 is the 22989-th square number.

528494121 is the 11495-th centered octagonal number.

It is an amenable number.

528494121 is a deficient number, since it is larger than the sum of its proper divisors (252724590).

528494121 is an frugal number, since it uses more digits than its factorization.

528494121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 179 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The cubic root of 528494121 is about 808.5000544998.

Multiplying 528494121 by its sum of digits (36), we get a square (19025788356 = 137934²).

The spelling of 528494121 in words is "five hundred twenty-eight million, four hundred ninety-four thousand, one hundred twenty-one".