252120437 has 2 divisors, whose sum is σ = 252120438. Its totient is φ = 252120436.

The previous prime is 252120389. The next prime is 252120469. The reversal of 252120437 is 734021252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156100036 + 96020401 = 12494^2 + 9799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252120437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252120497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126060218 + 126060219.

It is an arithmetic number, because the mean of its divisors is an integer number (126060219).

Almost surely, 2^252120437 is an apocalyptic number.

It is an amenable number.

252120437 is a deficient number, since it is larger than the sum of its proper divisors (1).

252120437 is an equidigital number, since it uses as much as digits as its factorization.

252120437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 252120437 is about 15878.3008221913. The cubic root of 252120437 is about 631.7365685280.

Adding to 252120437 its reverse (734021252), we get a palindrome (986141689).

The spelling of 252120437 in words is "two hundred fifty-two million, one hundred twenty thousand, four hundred thirty-seven".