143533121 has 4 divisors (see below), whose sum is σ = 143618244. Its totient is φ = 143448000.

The previous prime is 143533109. The next prime is 143533127. The reversal of 143533121 is 121335341.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102111025 + 41422096 = 10105^2 + 6436^2 .

It is a cyclic number.

It is not a de Polignac number, because 143533121 - 2¹⁸ = 143270977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143533127) 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, 39980 + ... + 43421.

It is an arithmetic number, because the mean of its divisors is an integer number (35904561).

Almost surely, 2^143533121 is an apocalyptic number.

It is an amenable number.

143533121 is a deficient number, since it is larger than the sum of its proper divisors (85123).

143533121 is an equidigital number, since it uses as much as digits as its factorization.

143533121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85122.

The product of its digits is 1080, while the sum is 23.

The square root of 143533121 is about 11980.5309147800. The cubic root of 143533121 is about 523.5811983480.

Adding to 143533121 its reverse (121335341), we get a palindrome (264868462).

The spelling of 143533121 in words is "one hundred forty-three million, five hundred thirty-three thousand, one hundred twenty-one".