1203143 has 4 divisors (see below), whose sum is σ = 1214928. Its totient is φ = 1191360.

The previous prime is 1203127. The next prime is 1203149. The reversal of 1203143 is 3413021.

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 1203143 - 2⁴ = 1203127 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9 and base 14.

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5738 + ... + 5943.

It is an arithmetic number, because the mean of its divisors is an integer number (303732).

2^1203143 is an apocalyptic number.

1203143 is a deficient number, since it is larger than the sum of its proper divisors (11785).

1203143 is a wasteful number, since it uses less digits than its factorization.

1203143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11784.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1203143 is about 1096.8787535548. The cubic root of 1203143 is about 106.3585520341.

Adding to 1203143 its reverse (3413021), we get a palindrome (4616164).

The spelling of 1203143 in words is "one million, two hundred three thousand, one hundred forty-three".