521484121 has 2 divisors, whose sum is σ = 521484122. Its totient is φ = 521484120.

The previous prime is 521484113. The next prime is 521484133. The reversal of 521484121 is 121484125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 521482896 + 1225 = 22836^2 + 35^2 .

It is a cyclic number.

It is not a de Polignac number, because 521484121 - 2³ = 521484113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521484121.

It is not a weakly prime, because it can be changed into another prime (521484151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260742060 + 260742061.

It is an arithmetic number, because the mean of its divisors is an integer number (260742061).

Almost surely, 2^521484121 is an apocalyptic number.

It is an amenable number.

521484121 is a deficient number, since it is larger than the sum of its proper divisors (1).

521484121 is an equidigital number, since it uses as much as digits as its factorization.

521484121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2560, while the sum is 28.

The square root of 521484121 is about 22836.0268216693. The cubic root of 521484121 is about 804.9094562721.

The spelling of 521484121 in words is "five hundred twenty-one million, four hundred eighty-four thousand, one hundred twenty-one".