252810521 has 2 divisors, whose sum is σ = 252810522. Its totient is φ = 252810520.

The previous prime is 252810491. The next prime is 252810527. The reversal of 252810521 is 125018252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216678400 + 36132121 = 14720^2 + 6011^2 .

It is a cyclic number.

It is not a de Polignac number, because 252810521 - 2²⁶ = 185701657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (252810527) 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, 126405260 + 126405261.

It is an arithmetic number, because the mean of its divisors is an integer number (126405261).

Almost surely, 2^252810521 is an apocalyptic number.

It is an amenable number.

252810521 is a deficient number, since it is larger than the sum of its proper divisors (1).

252810521 is an equidigital number, since it uses as much as digits as its factorization.

252810521 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 252810521 is about 15900.0163836394. The cubic root of 252810521 is about 632.3124231429.

Adding to 252810521 its reverse (125018252), we get a palindrome (377828773).

The spelling of 252810521 in words is "two hundred fifty-two million, eight hundred ten thousand, five hundred twenty-one".