421127143 has 4 divisors (see below), whose sum is σ = 426201048. Its totient is φ = 416053240.

The previous prime is 421127137. The next prime is 421127167. The reversal of 421127143 is 341721124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421127143 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 (421127543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2536828 + ... + 2536993.

It is an arithmetic number, because the mean of its divisors is an integer number (106550262).

Almost surely, 2^421127143 is an apocalyptic number.

421127143 is a deficient number, since it is larger than the sum of its proper divisors (5073905).

421127143 is an equidigital number, since it uses as much as digits as its factorization.

421127143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5073904.

The product of its digits is 1344, while the sum is 25.

The square root of 421127143 is about 20521.3825801285. The cubic root of 421127143 is about 749.5565633517.

Adding to 421127143 its reverse (341721124), we get a palindrome (762848267).

The spelling of 421127143 in words is "four hundred twenty-one million, one hundred twenty-seven thousand, one hundred forty-three".