1421143 has 4 divisors (see below), whose sum is σ = 1495960. Its totient is φ = 1346328.

The previous prime is 1421141. The next prime is 1421153. The reversal of 1421143 is 3411241.

1421143 is nontrivially palindromic in base 5.

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

It is a cyclic number.

It is not a de Polignac number, because 1421143 - 2¹ = 1421141 is a prime.

It is a Duffinian number.

1421143 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37380 + ... + 37417.

It is an arithmetic number, because the mean of its divisors is an integer number (373990).

2^1421143 is an apocalyptic number.

1421143 is a deficient number, since it is larger than the sum of its proper divisors (74817).

1421143 is an equidigital number, since it uses as much as digits as its factorization.

1421143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74816.

The product of its digits is 96, while the sum is 16.

The square root of 1421143 is about 1192.1170244569. The cubic root of 1421143 is about 112.4292361565.

Adding to 1421143 its reverse (3411241), we get a palindrome (4832384).

It can be divided in two parts, 1421 and 143, that multiplied together give a triangular number (203203 = T₆₃₇).

The spelling of 1421143 in words is "one million, four hundred twenty-one thousand, one hundred forty-three".