525628121 has 2 divisors, whose sum is σ = 525628122. Its totient is φ = 525628120.

The previous prime is 525628091. The next prime is 525628211. The reversal of 525628121 is 121826525.

Together with next prime (525628211) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 434138896 + 91489225 = 20836^2 + 9565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525628121 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (525628721) 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, 262814060 + 262814061.

It is an arithmetic number, because the mean of its divisors is an integer number (262814061).

Almost surely, 2^525628121 is an apocalyptic number.

It is an amenable number.

525628121 is a deficient number, since it is larger than the sum of its proper divisors (1).

525628121 is an equidigital number, since it uses as much as digits as its factorization.

525628121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 32.

The square root of 525628121 is about 22926.5811014202. The cubic root of 525628121 is about 807.0359180982.

The spelling of 525628121 in words is "five hundred twenty-five million, six hundred twenty-eight thousand, one hundred twenty-one".