1491729 has 16 divisors (see below), whose sum is σ = 2079360. Its totient is φ = 950400.

The previous prime is 1491727. The next prime is 1491739. The reversal of 1491729 is 9271941.

It is not a de Polignac number, because 1491729 - 2¹ = 1491727 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1491729.

It is not an unprimeable number, because it can be changed into a prime (1491727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9804 + ... + 9954.

It is an arithmetic number, because the mean of its divisors is an integer number (129960).

2^1491729 is an apocalyptic number.

It is an amenable number.

1491729 is a deficient number, since it is larger than the sum of its proper divisors (587631).

1491729 is a wasteful number, since it uses less digits than its factorization.

1491729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280.

The product of its digits is 4536, while the sum is 33.

The square root of 1491729 is about 1221.3635822309. The cubic root of 1491729 is about 114.2606378761.

The spelling of 1491729 in words is "one million, four hundred ninety-one thousand, seven hundred twenty-nine".