143421 has 4 divisors (see below), whose sum is σ = 191232. Its totient is φ = 95612.

The previous prime is 143419. The next prime is 143443. The reversal of 143421 is 124341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 143421 - 2¹ = 143419 is a prime.

It is a D-number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 143421.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143421.

It is not an unprimeable number, because it can be changed into a prime (143401) 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, 23901 + ... + 23906.

It is an arithmetic number, because the mean of its divisors is an integer number (47808).

2¹⁴³⁴²¹ is an apocalyptic number.

It is an amenable number.

143421 is a deficient number, since it is larger than the sum of its proper divisors (47811).

143421 is an equidigital number, since it uses as much as digits as its factorization.

143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47810.

The product of its digits is 96, while the sum is 15.

The square root of 143421 is about 378.7096513162. The cubic root of 143421 is about 52.3444830892.

Adding to 143421 its reverse (124341), we get a palindrome (267762).

The spelling of 143421 in words is "one hundred forty-three thousand, four hundred twenty-one", and thus it is an iban number.