125270729 has 2 divisors, whose sum is σ = 125270730. Its totient is φ = 125270728.

The previous prime is 125270713. The next prime is 125270731. The reversal of 125270729 is 927072521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100000000 + 25270729 = 10000^2 + 5027^2 .

It is a cyclic number.

It is not a de Polignac number, because 125270729 - 2⁴ = 125270713 is a prime.

Together with 125270731, it forms a pair of twin primes.

It is a Chen 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 (125270779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62635364 + 62635365.

It is an arithmetic number, because the mean of its divisors is an integer number (62635365).

Almost surely, 2^125270729 is an apocalyptic number.

It is an amenable number.

125270729 is a deficient number, since it is larger than the sum of its proper divisors (1).

125270729 is an equidigital number, since it uses as much as digits as its factorization.

125270729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 125270729 is about 11192.4407079064. The cubic root of 125270729 is about 500.3607117115.

The spelling of 125270729 in words is "one hundred twenty-five million, two hundred seventy thousand, seven hundred twenty-nine".