1143001 has 4 divisors (see below), whose sum is σ = 1179904. Its totient is φ = 1106100.

The previous prime is 1142971. The next prime is 1143013. The reversal of 1143001 is 1003411.

It is a happy number.

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 1143001 - 2⁵ = 1142969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143061) 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, 18405 + ... + 18466.

It is an arithmetic number, because the mean of its divisors is an integer number (294976).

2^1143001 is an apocalyptic number.

It is an amenable number.

1143001 is a deficient number, since it is larger than the sum of its proper divisors (36903).

1143001 is an equidigital number, since it uses as much as digits as its factorization.

1143001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36902.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1143001 is about 1069.1122485502. The cubic root of 1143001 is about 104.5559783414. Note that the first 3 decimals are identical.

Adding to 1143001 its reverse (1003411), we get a palindrome (2146412).

The spelling of 1143001 in words is "one million, one hundred forty-three thousand, one".