143503 has 2 divisors, whose sum is σ = 143504. Its totient is φ = 143502.

The previous prime is 143501. The next prime is 143509. The reversal of 143503 is 305341.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 143503 - 2¹ = 143501 is a prime.

It is a super-2 number, since 2×143503² = 41186222018, which contains 22 as substring.

Together with 143501, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71751 + 71752.

It is an arithmetic number, because the mean of its divisors is an integer number (71752).

2¹⁴³⁵⁰³ is an apocalyptic number.

143503 is a deficient number, since it is larger than the sum of its proper divisors (1).

143503 is an equidigital number, since it uses as much as digits as its factorization.

143503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 143503 is about 378.8178982044. The cubic root of 143503 is about 52.3544570582.

Adding to 143503 its reverse (305341), we get a palindrome (448844).

It can be divided in two parts, 143 and 503, that added together give a palindrome (646).

The spelling of 143503 in words is "one hundred forty-three thousand, five hundred three".