1143221403 has 8 divisors (see below), whose sum is σ = 1543590400. Its totient is φ = 752500008.

The previous prime is 1143221399. The next prime is 1143221437. The reversal of 1143221403 is 3041223411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1143221403 - 2² = 1143221399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1143221403.

It is not an unprimeable number, because it can be changed into a prime (1143221473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2411623 + ... + 2412096.

It is an arithmetic number, because the mean of its divisors is an integer number (192948800).

Almost surely, 2^1143221403 is an apocalyptic number.

1143221403 is a deficient number, since it is larger than the sum of its proper divisors (400368997).

1143221403 is an equidigital number, since it uses as much as digits as its factorization.

1143221403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4823801.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1143221403 is about 33811.5572400917. The cubic root of 1143221403 is about 1045.6269836187.

Adding to 1143221403 its reverse (3041223411), we get a palindrome (4184444814).

The spelling of 1143221403 in words is "one billion, one hundred forty-three million, two hundred twenty-one thousand, four hundred three".