143221129 has 8 divisors (see below), whose sum is σ = 145506240. Its totient is φ = 140943600.

The previous prime is 143221123. The next prime is 143221153. The reversal of 143221129 is 921122341.

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

It is a cyclic number.

It is not a de Polignac number, because 143221129 - 2⁹ = 143220617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143221123) 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, 45259 + ... + 48319.

It is an arithmetic number, because the mean of its divisors is an integer number (18188280).

Almost surely, 2^143221129 is an apocalyptic number.

It is an amenable number.

143221129 is a deficient number, since it is larger than the sum of its proper divisors (2285111).

143221129 is an equidigital number, since it uses as much as digits as its factorization.

143221129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791.

The product of its digits is 864, while the sum is 25.

The square root of 143221129 is about 11967.5030394815. The cubic root of 143221129 is about 523.2015608928.

It can be divided in two parts, 14322 and 1129, that added together give a palindrome (15451).

The spelling of 143221129 in words is "one hundred forty-three million, two hundred twenty-one thousand, one hundred twenty-nine".