143111421 has 8 divisors (see below), whose sum is σ = 212016960. Its totient is φ = 95407596.

The previous prime is 143111413. The next prime is 143111453. The reversal of 143111421 is 124111341.

It is not a de Polignac number, because 143111421 - 2³ = 143111413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 143111394 and 143111403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143111461) 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, 2650185 + ... + 2650238.

It is an arithmetic number, because the mean of its divisors is an integer number (26502120).

Almost surely, 2^143111421 is an apocalyptic number.

It is an amenable number.

143111421 is a deficient number, since it is larger than the sum of its proper divisors (68905539).

143111421 is an equidigital number, since it uses as much as digits as its factorization.

143111421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5300432 (or 5300426 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 143111421 is about 11962.9185820184. The cubic root of 143111421 is about 523.0679352201.

Adding to 143111421 its reverse (124111341), we get a palindrome (267222762).

The spelling of 143111421 in words is "one hundred forty-three million, one hundred eleven thousand, four hundred twenty-one".