125129507 has 2 divisors, whose sum is σ = 125129508. Its totient is φ = 125129506.

The previous prime is 125129491. The next prime is 125129509. The reversal of 125129507 is 705921521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125129507 - 2⁴ = 125129491 is a prime.

Together with 125129509, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125129509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62564753 + 62564754.

It is an arithmetic number, because the mean of its divisors is an integer number (62564754).

Almost surely, 2^125129507 is an apocalyptic number.

125129507 is a deficient number, since it is larger than the sum of its proper divisors (1).

125129507 is an equidigital number, since it uses as much as digits as its factorization.

125129507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 125129507 is about 11186.1301172479. The cubic root of 125129507 is about 500.1726164003.

The spelling of 125129507 in words is "one hundred twenty-five million, one hundred twenty-nine thousand, five hundred seven".