520825121 has 2 divisors, whose sum is σ = 520825122. Its totient is φ = 520825120.

The previous prime is 520825069. The next prime is 520825163. The reversal of 520825121 is 121528025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 513475600 + 7349521 = 22660^2 + 2711^2 .

It is a cyclic number.

It is not a de Polignac number, because 520825121 - 2²² = 516630817 is a prime.

It is not a weakly prime, because it can be changed into another prime (520825421) 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 as a sum of consecutive naturals, namely, 260412560 + 260412561.

It is an arithmetic number, because the mean of its divisors is an integer number (260412561).

Almost surely, 2^520825121 is an apocalyptic number.

It is an amenable number.

520825121 is a deficient number, since it is larger than the sum of its proper divisors (1).

520825121 is an equidigital number, since it uses as much as digits as its factorization.

520825121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 520825121 is about 22821.5933054640. The cubic root of 520825121 is about 804.5702583914.

The spelling of 520825121 in words is "five hundred twenty million, eight hundred twenty-five thousand, one hundred twenty-one".