1729129 has 2 divisors, whose sum is σ = 1729130. Its totient is φ = 1729128.

The previous prime is 1729127. The next prime is 1729141. The reversal of 1729129 is 9219271.

1729129 is nontrivially palindromic in base 4.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1010025 + 719104 = 1005^2 + 848^2 .

It is an emirp because it is prime and its reverse (9219271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1729129 - 2¹ = 1729127 is a prime.

Together with 1729127, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1729129.

It is not a weakly prime, because it can be changed into another prime (1729127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864564 + 864565.

It is an arithmetic number, because the mean of its divisors is an integer number (864565).

2^1729129 is an apocalyptic number.

It is an amenable number.

1729129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1729129 is an equidigital number, since it uses as much as digits as its factorization.

1729129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 31.

The square root of 1729129 is about 1314.9634975922. The cubic root of 1729129 is about 120.0261285697.

The spelling of 1729129 in words is "one million, seven hundred twenty-nine thousand, one hundred twenty-nine".