1143739 has 8 divisors (see below), whose sum is σ = 1179360. Its totient is φ = 1108800.

The previous prime is 1143719. The next prime is 1143749. The reversal of 1143739 is 9373411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1143739 - 2⁹ = 1143227 is a prime.

It is a Duffinian number.

1143739 is a lucky 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6229 + ... + 6409.

It is an arithmetic number, because the mean of its divisors is an integer number (147420).

2^1143739 is an apocalyptic number.

1143739 is a deficient number, since it is larger than the sum of its proper divisors (35621).

1143739 is an equidigital number, since it uses as much as digits as its factorization.

1143739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341.

The product of its digits is 2268, while the sum is 28.

The square root of 1143739 is about 1069.4573390276. The cubic root of 1143739 is about 104.5784763418.

It can be divided in two parts, 11437 and 39, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 1143739 in words is "one million, one hundred forty-three thousand, seven hundred thirty-nine".