1143747 has 16 divisors (see below), whose sum is σ = 1848960. Its totient is φ = 693000.

The previous prime is 1143719. The next prime is 1143749. The reversal of 1143747 is 7473411.

It is not a de Polignac number, because 1143747 - 2⁷ = 1143619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1143747.

It is not an unprimeable number, because it can be changed into a prime (1143749) 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 15 ways as a sum of consecutive naturals, for example, 1629 + ... + 2222.

It is an arithmetic number, because the mean of its divisors is an integer number (115560).

2^1143747 is an apocalyptic number.

1143747 is a deficient number, since it is larger than the sum of its proper divisors (705213).

1143747 is a wasteful number, since it uses less digits than its factorization.

1143747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871 (or 3865 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 1143747 is about 1069.4610792357. The cubic root of 1143747 is about 104.5787201696.

The spelling of 1143747 in words is "one million, one hundred forty-three thousand, seven hundred forty-seven".