125252521 has 2 divisors, whose sum is σ = 125252522. Its totient is φ = 125252520.

The previous prime is 125252513. The next prime is 125252527.

125252521 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120758121 + 4494400 = 10989^2 + 2120^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 125252521 - 2³ = 125252513 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (125252527) 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, 62626260 + 62626261.

It is an arithmetic number, because the mean of its divisors is an integer number (62626261).

Almost surely, 2^125252521 is an apocalyptic number.

It is an amenable number.

125252521 is a deficient number, since it is larger than the sum of its proper divisors (1).

125252521 is an equidigital number, since it uses as much as digits as its factorization.

125252521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2000, while the sum is 25.

The square root of 125252521 is about 11191.6272722067. The cubic root of 125252521 is about 500.3364681942.

The spelling of 125252521 in words is "one hundred twenty-five million, two hundred fifty-two thousand, five hundred twenty-one".