1543143 has 8 divisors (see below), whose sum is σ = 2351488. Its totient is φ = 881784.

The previous prime is 1543133. The next prime is 1543169. The reversal of 1543143 is 3413451.

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

It is not a de Polignac number, because 1543143 - 2⁴ = 1543127 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 73483 = 1543143 / (1 + 5 + 4 + 3 + 1 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1543103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36721 + ... + 36762.

It is an arithmetic number, because the mean of its divisors is an integer number (293936).

2^1543143 is an apocalyptic number.

1543143 is a deficient number, since it is larger than the sum of its proper divisors (808345).

1543143 is an equidigital number, since it uses as much as digits as its factorization.

1543143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73493.

The product of its digits is 720, while the sum is 21.

The square root of 1543143 is about 1242.2330699188. The cubic root of 1543143 is about 115.5585430619.

Adding to 1543143 its reverse (3413451), we get a palindrome (4956594).

The spelling of 1543143 in words is "one million, five hundred forty-three thousand, one hundred forty-three".