125738761 has 2 divisors, whose sum is σ = 125738762. Its totient is φ = 125738760.

The previous prime is 125738687. The next prime is 125738791. The reversal of 125738761 is 167837521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124188736 + 1550025 = 11144^2 + 1245^2 .

It is a cyclic number.

It is not a de Polignac number, because 125738761 - 2¹⁹ = 125214473 is a prime.

It is not a weakly prime, because it can be changed into another prime (125738791) 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, 62869380 + 62869381.

It is an arithmetic number, because the mean of its divisors is an integer number (62869381).

Almost surely, 2^125738761 is an apocalyptic number.

It is an amenable number.

125738761 is a deficient number, since it is larger than the sum of its proper divisors (1).

125738761 is an equidigital number, since it uses as much as digits as its factorization.

125738761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 40.

The square root of 125738761 is about 11213.3296125638. The cubic root of 125738761 is about 500.9830805053.

The spelling of 125738761 in words is "one hundred twenty-five million, seven hundred thirty-eight thousand, seven hundred sixty-one".