143011421 has 16 divisors (see below), whose sum is σ = 167739264. Its totient is φ = 119375424.

The previous prime is 143011417. The next prime is 143011471. The reversal of 143011421 is 124110341.

It is a happy number.

It is not a de Polignac number, because 143011421 - 2² = 143011417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143011421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143011411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167231 + ... + 168083.

It is an arithmetic number, because the mean of its divisors is an integer number (10483704).

Almost surely, 2^143011421 is an apocalyptic number.

It is an amenable number.

143011421 is a deficient number, since it is larger than the sum of its proper divisors (24727843).

143011421 is an equidigital number, since it uses as much as digits as its factorization.

143011421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 143011421 is about 11958.7382695667. The cubic root of 143011421 is about 522.9460745022.

Adding to 143011421 its reverse (124110341), we get a palindrome (267121762).

The spelling of 143011421 in words is "one hundred forty-three million, eleven thousand, four hundred twenty-one".