252524021 has 2 divisors, whose sum is σ = 252524022. Its totient is φ = 252524020.

The previous prime is 252523991. The next prime is 252524039. The reversal of 252524021 is 120425252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162843121 + 89680900 = 12761^2 + 9470^2 .

It is a cyclic number.

It is not a de Polignac number, because 252524021 - 2¹⁴ = 252507637 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252524221) 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, 126262010 + 126262011.

It is an arithmetic number, because the mean of its divisors is an integer number (126262011).

Almost surely, 2^252524021 is an apocalyptic number.

It is an amenable number.

252524021 is a deficient number, since it is larger than the sum of its proper divisors (1).

252524021 is an equidigital number, since it uses as much as digits as its factorization.

252524021 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 23.

The square root of 252524021 is about 15891.0044050085. The cubic root of 252524021 is about 632.0734747736.

Adding to 252524021 its reverse (120425252), we get a palindrome (372949273).

The spelling of 252524021 in words is "two hundred fifty-two million, five hundred twenty-four thousand, twenty-one".