405200129 has 2 divisors, whose sum is σ = 405200130. Its totient is φ = 405200128.

The previous prime is 405200111. The next prime is 405200149. The reversal of 405200129 is 921002504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343546225 + 61653904 = 18535^2 + 7852^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405200129 is a prime.

It is not a weakly prime, because it can be changed into another prime (405200149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202600064 + 202600065.

It is an arithmetic number, because the mean of its divisors is an integer number (202600065).

Almost surely, 2^405200129 is an apocalyptic number.

It is an amenable number.

405200129 is a deficient number, since it is larger than the sum of its proper divisors (1).

405200129 is an equidigital number, since it uses as much as digits as its factorization.

405200129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 405200129 is about 20129.5834283772. The cubic root of 405200129 is about 739.9854690353.

The spelling of 405200129 in words is "four hundred five million, two hundred thousand, one hundred twenty-nine".