1347729 has 4 divisors (see below), whose sum is σ = 1796976. Its totient is φ = 898484.

The previous prime is 1347713. The next prime is 1347733. The reversal of 1347729 is 9277431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1347729 - 2⁴ = 1347713 is a prime.

It is a D-number.

1347729 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1347729.

It is not an unprimeable number, because it can be changed into a prime (1347739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224619 + ... + 224624.

It is an arithmetic number, because the mean of its divisors is an integer number (449244).

2^1347729 is an apocalyptic number.

It is an amenable number.

1347729 is a deficient number, since it is larger than the sum of its proper divisors (449247).

1347729 is an equidigital number, since it uses as much as digits as its factorization.

1347729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449246.

The product of its digits is 10584, while the sum is 33.

The square root of 1347729 is about 1160.9173097168. The cubic root of 1347729 is about 110.4589365790.

The spelling of 1347729 in words is "one million, three hundred forty-seven thousand, seven hundred twenty-nine".