1143004021 has 4 divisors (see below), whose sum is σ = 1192699872. Its totient is φ = 1093308172.

The previous prime is 1143004019. The next prime is 1143004063. The reversal of 1143004021 is 1204003411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1143004021 - 2¹ = 1143004019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1143003986 and 1143004004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143004721) 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, 24847891 + ... + 24847936.

It is an arithmetic number, because the mean of its divisors is an integer number (298174968).

Almost surely, 2^1143004021 is an apocalyptic number.

It is an amenable number.

1143004021 is a deficient number, since it is larger than the sum of its proper divisors (49695851).

1143004021 is an equidigital number, since it uses as much as digits as its factorization.

1143004021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49695850.

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

The square root of 1143004021 is about 33808.3424763770. The cubic root of 1143004021 is about 1045.5607045664.

Adding to 1143004021 its reverse (1204003411), we get a palindrome (2347007432).

The spelling of 1143004021 in words is "one billion, one hundred forty-three million, four thousand, twenty-one".