1143547 has 4 divisors (see below), whose sum is σ = 1147536. Its totient is φ = 1139560.

The previous prime is 1143529. The next prime is 1143551. The reversal of 1143547 is 7453411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1143547 - 2¹⁵ = 1110779 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143577) 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 3 ways as a sum of consecutive naturals, for example, 1528 + ... + 2149.

It is an arithmetic number, because the mean of its divisors is an integer number (286884).

2^1143547 is an apocalyptic number.

1143547 is a deficient number, since it is larger than the sum of its proper divisors (3989).

1143547 is an equidigital number, since it uses as much as digits as its factorization.

1143547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988.

The product of its digits is 1680, while the sum is 25.

The square root of 1143547 is about 1069.3675701086. The cubic root of 1143547 is about 104.5726241351.

Adding to 1143547 its reverse (7453411), we get a palindrome (8596958).

The spelling of 1143547 in words is "one million, one hundred forty-three thousand, five hundred forty-seven".