143302021 has 4 divisors (see below), whose sum is σ = 148243500. Its totient is φ = 138360544.

The previous prime is 143302007. The next prime is 143302031. The reversal of 143302021 is 120203341.

It is a happy number.

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 48024900 + 95277121 = 6930^2 + 9761^2 .

It is a cyclic number.

It is not a de Polignac number, because 143302021 - 2¹¹ = 143299973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143301986 and 143302004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143302001) 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, 2470696 + ... + 2470753.

It is an arithmetic number, because the mean of its divisors is an integer number (37060875).

Almost surely, 2^143302021 is an apocalyptic number.

It is an amenable number.

143302021 is a deficient number, since it is larger than the sum of its proper divisors (4941479).

143302021 is an equidigital number, since it uses as much as digits as its factorization.

143302021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4941478.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 143302021 is about 11970.8822147743. The cubic root of 143302021 is about 523.3000446278.

Adding to 143302021 its reverse (120203341), we get a palindrome (263505362).

The spelling of 143302021 in words is "one hundred forty-three million, three hundred two thousand, twenty-one".