1143421 has 4 divisors (see below), whose sum is σ = 1154844. Its totient is φ = 1132000.

The previous prime is 1143407. The next prime is 1143433. The reversal of 1143421 is 1243411.

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

It can be written as a sum of positive squares in 2 ways, for example, as 617796 + 525625 = 786^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143421 - 2⁹ = 1142909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1143395 and 1143404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143481) 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, 5560 + ... + 5761.

It is an arithmetic number, because the mean of its divisors is an integer number (288711).

2^1143421 is an apocalyptic number.

It is an amenable number.

1143421 is a deficient number, since it is larger than the sum of its proper divisors (11423).

1143421 is a wasteful number, since it uses less digits than its factorization.

1143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11422.

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

The square root of 1143421 is about 1069.3086551600. The cubic root of 1143421 is about 104.5687832685.

Adding to 1143421 its reverse (1243411), we get a palindrome (2386832).

The spelling of 1143421 in words is "one million, one hundred forty-three thousand, four hundred twenty-one".