125345729 has 2 divisors, whose sum is σ = 125345730. Its totient is φ = 125345728.

The previous prime is 125345723. The next prime is 125345767. The reversal of 125345729 is 927543521.

It is an a-pointer prime, because the next prime (125345767) can be obtained adding 125345729 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63361600 + 61984129 = 7960^2 + 7873^2 .

It is an emirp because it is prime and its reverse (927543521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125345729 - 2⁴ = 125345713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125345692 and 125345701.

It is not a weakly prime, because it can be changed into another prime (125345723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62672864 + 62672865.

It is an arithmetic number, because the mean of its divisors is an integer number (62672865).

Almost surely, 2^125345729 is an apocalyptic number.

It is an amenable number.

125345729 is a deficient number, since it is larger than the sum of its proper divisors (1).

125345729 is an equidigital number, since it uses as much as digits as its factorization.

125345729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 38.

The square root of 125345729 is about 11195.7906822162. The cubic root of 125345729 is about 500.4605476615.

The spelling of 125345729 in words is "one hundred twenty-five million, three hundred forty-five thousand, seven hundred twenty-nine".