143415421 has 4 divisors (see below), whose sum is σ = 144365344. Its totient is φ = 142465500.

The previous prime is 143415407. The next prime is 143415427. The reversal of 143415421 is 124514341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 143415421 - 2¹⁵ = 143382653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143415427) 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 3 ways as a sum of consecutive naturals, for example, 474735 + ... + 475036.

It is an arithmetic number, because the mean of its divisors is an integer number (36091336).

Almost surely, 2^143415421 is an apocalyptic number.

It is an amenable number.

143415421 is a deficient number, since it is larger than the sum of its proper divisors (949923).

143415421 is an equidigital number, since it uses as much as digits as its factorization.

143415421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949922.

The product of its digits is 1920, while the sum is 25.

The square root of 143415421 is about 11975.6177711215. The cubic root of 143415421 is about 523.4380435625.

Adding to 143415421 its reverse (124514341), we get a palindrome (267929762).

The spelling of 143415421 in words is "one hundred forty-three million, four hundred fifteen thousand, four hundred twenty-one".