143721 has 8 divisors (see below), whose sum is σ = 212960. Its totient is φ = 95796.

The previous prime is 143719. The next prime is 143729. The reversal of 143721 is 127341.

It is not a de Polignac number, because 143721 - 2¹ = 143719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143694 and 143703.

It is not an unprimeable number, because it can be changed into a prime (143729) 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, 2635 + ... + 2688.

It is an arithmetic number, because the mean of its divisors is an integer number (26620).

2¹⁴³⁷²¹ is an apocalyptic number.

It is an amenable number.

143721 is a deficient number, since it is larger than the sum of its proper divisors (69239).

143721 is an equidigital number, since it uses as much as digits as its factorization.

143721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332 (or 5326 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 143721 is about 379.1055262061. The cubic root of 143721 is about 52.3809547553.

The spelling of 143721 in words is "one hundred forty-three thousand, seven hundred twenty-one", and thus it is an iban number.