252557749 has 2 divisors, whose sum is σ = 252557750. Its totient is φ = 252557748.

The previous prime is 252557741. The next prime is 252557777. The reversal of 252557749 is 947755252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138815524 + 113742225 = 11782^2 + 10665^2 .

It is a cyclic number.

It is not a de Polignac number, because 252557749 - 2³ = 252557741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 252557699 and 252557708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252557741) 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, 126278874 + 126278875.

It is an arithmetic number, because the mean of its divisors is an integer number (126278875).

Almost surely, 2^252557749 is an apocalyptic number.

It is an amenable number.

252557749 is a deficient number, since it is larger than the sum of its proper divisors (1).

252557749 is an equidigital number, since it uses as much as digits as its factorization.

252557749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882000, while the sum is 46.

The square root of 252557749 is about 15892.0655989082. The cubic root of 252557749 is about 632.1016141760.

The spelling of 252557749 in words is "two hundred fifty-two million, five hundred fifty-seven thousand, seven hundred forty-nine".