126205129 has 8 divisors (see below), whose sum is σ = 133594560. Its totient is φ = 119018256.

The previous prime is 126205111. The next prime is 126205141. The reversal of 126205129 is 921502621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126205129 - 2⁵ = 126205097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126205097 and 126205106.

It is not an unprimeable number, because it can be changed into a prime (126205159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49357 + ... + 51850.

It is an arithmetic number, because the mean of its divisors is an integer number (16699320).

Almost surely, 2^126205129 is an apocalyptic number.

It is an amenable number.

126205129 is a deficient number, since it is larger than the sum of its proper divisors (7389431).

126205129 is a wasteful number, since it uses less digits than its factorization.

126205129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101279.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 126205129 is about 11234.1056163809. The cubic root of 126205129 is about 501.6017022874.

The spelling of 126205129 in words is "one hundred twenty-six million, two hundred five thousand, one hundred twenty-nine".