1729429 has 4 divisors (see below), whose sum is σ = 1862476. Its totient is φ = 1596384.

The previous prime is 1729391. The next prime is 1729433. The reversal of 1729429 is 9249271.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108900 + 1620529 = 330^2 + 1273^2 .

It is a cyclic number.

It is not a de Polignac number, because 1729429 - 2¹¹ = 1727381 is a prime.

It is a Duffinian number.

1729429 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1729394 and 1729403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1729499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66504 + ... + 66529.

It is an arithmetic number, because the mean of its divisors is an integer number (465619).

2^1729429 is an apocalyptic number.

It is an amenable number.

1729429 is a deficient number, since it is larger than the sum of its proper divisors (133047).

1729429 is a wasteful number, since it uses less digits than its factorization.

1729429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133046.

The product of its digits is 9072, while the sum is 34.

The square root of 1729429 is about 1315.0775642524. The cubic root of 1729429 is about 120.0330695896.

The spelling of 1729429 in words is "one million, seven hundred twenty-nine thousand, four hundred twenty-nine".