250000129 has 2 divisors, whose sum is σ = 250000130. Its totient is φ = 250000128.

The previous prime is 250000123. The next prime is 250000139. The reversal of 250000129 is 921000052.

250000129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235162225 + 14837904 = 15335^2 + 3852^2 .

It is a cyclic number.

It is not a de Polignac number, because 250000129 - 2¹¹ = 249998081 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (250000123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125000064 + 125000065.

It is an arithmetic number, because the mean of its divisors is an integer number (125000065).

Almost surely, 2^250000129 is an apocalyptic number.

It is an amenable number.

250000129 is a deficient number, since it is larger than the sum of its proper divisors (1).

250000129 is an equidigital number, since it uses as much as digits as its factorization.

250000129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 250000129 is about 15811.3923801796. The cubic root of 250000129 is about 629.9606333006.

The spelling of 250000129 in words is "two hundred fifty million, one hundred twenty-nine", and thus it is an aban number.