125605577 has 2 divisors, whose sum is σ = 125605578. Its totient is φ = 125605576.

The previous prime is 125605559. The next prime is 125605589. The reversal of 125605577 is 775506521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119159056 + 6446521 = 10916^2 + 2539^2 .

It is a cyclic number.

It is not a de Polignac number, because 125605577 - 2⁸ = 125605321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125605577.

It is not a weakly prime, because it can be changed into another prime (125605517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62802788 + 62802789.

It is an arithmetic number, because the mean of its divisors is an integer number (62802789).

Almost surely, 2^125605577 is an apocalyptic number.

It is an amenable number.

125605577 is a deficient number, since it is larger than the sum of its proper divisors (1).

125605577 is an equidigital number, since it uses as much as digits as its factorization.

125605577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73500, while the sum is 38.

The square root of 125605577 is about 11207.3893927176. The cubic root of 125605577 is about 500.8061355923.

The spelling of 125605577 in words is "one hundred twenty-five million, six hundred five thousand, five hundred seventy-seven".