143144021 has 4 divisors (see below), whose sum is σ = 145104972. Its totient is φ = 141183072.

The previous prime is 143144011. The next prime is 143144101. The reversal of 143144021 is 120441341.

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 31080625 + 112063396 = 5575^2 + 10586^2 .

It is a cyclic number.

It is not a de Polignac number, because 143144021 - 2¹⁸ = 142881877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143143984 and 143144002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143144011) 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, 980366 + ... + 980511.

It is an arithmetic number, because the mean of its divisors is an integer number (36276243).

Almost surely, 2^143144021 is an apocalyptic number.

It is an amenable number.

143144021 is a deficient number, since it is larger than the sum of its proper divisors (1960951).

143144021 is an equidigital number, since it uses as much as digits as its factorization.

143144021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960950.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 143144021 is about 11964.2810481867. The cubic root of 143144021 is about 523.1076495442.

Adding to 143144021 its reverse (120441341), we get a palindrome (263585362).

The spelling of 143144021 in words is "one hundred forty-three million, one hundred forty-four thousand, twenty-one".