421425143 has 2 divisors, whose sum is σ = 421425144. Its totient is φ = 421425142.

The previous prime is 421425139. The next prime is 421425157. The reversal of 421425143 is 341524124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421425143 - 2² = 421425139 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421425743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210712571 + 210712572.

It is an arithmetic number, because the mean of its divisors is an integer number (210712572).

Almost surely, 2^421425143 is an apocalyptic number.

421425143 is a deficient number, since it is larger than the sum of its proper divisors (1).

421425143 is an equidigital number, since it uses as much as digits as its factorization.

421425143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 26.

The square root of 421425143 is about 20528.6420154866. The cubic root of 421425143 is about 749.7333232633.

Adding to 421425143 its reverse (341524124), we get a palindrome (762949267).

The spelling of 421425143 in words is "four hundred twenty-one million, four hundred twenty-five thousand, one hundred forty-three".