143248021 has 12 divisors (see below), whose sum is σ = 167026188. Its totient is φ = 122496192.

The previous prime is 143248019. The next prime is 143248043. The reversal of 143248021 is 120842341.

It can be written as a sum of positive squares in 2 ways, for example, as 51279921 + 91968100 = 7161^2 + 9590^2 .

It is not a de Polignac number, because 143248021 - 2¹ = 143248019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143248321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19195 + ... + 25591.

It is an arithmetic number, because the mean of its divisors is an integer number (13918849).

Almost surely, 2^143248021 is an apocalyptic number.

It is an amenable number.

143248021 is a deficient number, since it is larger than the sum of its proper divisors (23778167).

143248021 is an equidigital number, since it uses as much as digits as its factorization.

143248021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6868 (or 6861 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 143248021 is about 11968.6265293892. The cubic root of 143248021 is about 523.2343052604.

The spelling of 143248021 in words is "one hundred forty-three million, two hundred forty-eight thousand, twenty-one".