1729139 has 6 divisors (see below), whose sum is σ = 1757196. Its totient is φ = 1701500.

The previous prime is 1729129. The next prime is 1729141. The reversal of 1729139 is 9319271.

It is a happy number.

1729139 is nontrivially palindromic in base 5.

It is a de Polignac number, because none of the positive numbers 2^k-1729139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1729109) 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 5 ways as a sum of consecutive naturals, for example, 6764 + ... + 7014.

It is an arithmetic number, because the mean of its divisors is an integer number (292866).

2^1729139 is an apocalyptic number.

1729139 is a deficient number, since it is larger than the sum of its proper divisors (28057).

1729139 is an frugal number, since it uses more digits than its factorization.

1729139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 334 counting only the distinct ones).

The product of its digits is 3402, while the sum is 32.

The square root of 1729139 is about 1314.9672999737. The cubic root of 1729139 is about 120.0263599499.

The spelling of 1729139 in words is "one million, seven hundred twenty-nine thousand, one hundred thirty-nine".