125606521 has 2 divisors, whose sum is σ = 125606522. Its totient is φ = 125606520.

The previous prime is 125606497. The next prime is 125606581.

125606521 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113103225 + 12503296 = 10635^2 + 3536^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125606521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125606521.

It is not a weakly prime, because it can be changed into another prime (125606581) 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, 62803260 + 62803261.

It is an arithmetic number, because the mean of its divisors is an integer number (62803261).

Almost surely, 2^125606521 is an apocalyptic number.

It is an amenable number.

125606521 is a deficient number, since it is larger than the sum of its proper divisors (1).

125606521 is an equidigital number, since it uses as much as digits as its factorization.

125606521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 125606521 is about 11207.4315077095. The cubic root of 125606521 is about 500.8073902070.

The spelling of 125606521 in words is "one hundred twenty-five million, six hundred six thousand, five hundred twenty-one".