143021 has 8 divisors (see below), whose sum is σ = 155520. Its totient is φ = 131008.

The previous prime is 142993. The next prime is 143053. The reversal of 143021 is 120341.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 142993 and 143011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143821) 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, 710 + ... + 888.

It is an arithmetic number, because the mean of its divisors is an integer number (19440).

2¹⁴³⁰²¹ is an apocalyptic number.

It is an amenable number.

143021 is a deficient number, since it is larger than the sum of its proper divisors (12499).

143021 is a wasteful number, since it uses less digits than its factorization.

143021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 143021 is about 378.1811735134. The cubic root of 143021 is about 52.2957750000.

Adding to 143021 its reverse (120341), we get a palindrome (263362).

The spelling of 143021 in words is "one hundred forty-three thousand, twenty-one", and thus it is an iban number.