125762561 has 2 divisors, whose sum is σ = 125762562. Its totient is φ = 125762560.

The previous prime is 125762503. The next prime is 125762563. The reversal of 125762561 is 165267521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110986225 + 14776336 = 10535^2 + 3844^2 .

It is an emirp because it is prime and its reverse (165267521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125762561 is a prime.

It is a Sophie Germain prime.

Together with 125762563, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (125762563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62881280 + 62881281.

It is an arithmetic number, because the mean of its divisors is an integer number (62881281).

Almost surely, 2^125762561 is an apocalyptic number.

It is an amenable number.

125762561 is a deficient number, since it is larger than the sum of its proper divisors (1).

125762561 is an equidigital number, since it uses as much as digits as its factorization.

125762561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 35.

The square root of 125762561 is about 11214.3907993257. The cubic root of 125762561 is about 501.0146874259.

The spelling of 125762561 in words is "one hundred twenty-five million, seven hundred sixty-two thousand, five hundred sixty-one".