1143729 has 6 divisors (see below), whose sum is σ = 1652066. Its totient is φ = 762480.

The previous prime is 1143719. The next prime is 1143749. The reversal of 1143729 is 9273411.

It can be written as a sum of positive squares in only one way, i.e., 898704 + 245025 = 948^2 + 495^2 .

It is not a de Polignac number, because 1143729 - 2⁵ = 1143697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143719) 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, 63532 + ... + 63549.

2^1143729 is an apocalyptic number.

It is an amenable number.

1143729 is a deficient number, since it is larger than the sum of its proper divisors (508337).

1143729 is a wasteful number, since it uses less digits than its factorization.

1143729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127087 (or 127084 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 1143729 is about 1069.4526637491. The cubic root of 1143729 is about 104.5781715556.

The spelling of 1143729 in words is "one million, one hundred forty-three thousand, seven hundred twenty-nine".