525857249 has 2 divisors, whose sum is σ = 525857250. Its totient is φ = 525857248.

The previous prime is 525857231. The next prime is 525857251. The reversal of 525857249 is 942758525.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416445649 + 109411600 = 20407^2 + 10460^2 .

It is a cyclic number.

It is not a de Polignac number, because 525857249 - 2⁸ = 525856993 is a prime.

Together with 525857251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (525857279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262928624 + 262928625.

It is an arithmetic number, because the mean of its divisors is an integer number (262928625).

Almost surely, 2^525857249 is an apocalyptic number.

It is an amenable number.

525857249 is a deficient number, since it is larger than the sum of its proper divisors (1).

525857249 is an equidigital number, since it uses as much as digits as its factorization.

525857249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008000, while the sum is 47.

The square root of 525857249 is about 22931.5775514900. The cubic root of 525857249 is about 807.1531668121.

The spelling of 525857249 in words is "five hundred twenty-five million, eight hundred fifty-seven thousand, two hundred forty-nine".