125040129 has 4 divisors (see below), whose sum is σ = 166720176. Its totient is φ = 83360084.

The previous prime is 125040127. The next prime is 125040133. The reversal of 125040129 is 921040521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125040129 - 2¹ = 125040127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125040099 and 125040108.

It is not an unprimeable number, because it can be changed into a prime (125040127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20840019 + ... + 20840024.

It is an arithmetic number, because the mean of its divisors is an integer number (41680044).

Almost surely, 2^125040129 is an apocalyptic number.

It is an amenable number.

125040129 is a deficient number, since it is larger than the sum of its proper divisors (41680047).

125040129 is an equidigital number, since it uses as much as digits as its factorization.

125040129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41680046.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 125040129 is about 11182.1343669266. The cubic root of 125040129 is about 500.0534996087.

The spelling of 125040129 in words is "one hundred twenty-five million, forty thousand, one hundred twenty-nine".