1143425121 has 4 divisors (see below), whose sum is σ = 1524566832. Its totient is φ = 762283412.

The previous prime is 1143425113. The next prime is 1143425177. The reversal of 1143425121 is 1215243411.

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 1143425121 - 2³ = 1143425113 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1143425091 and 1143425100.

It is not an unprimeable number, because it can be changed into a prime (1143425221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190570851 + ... + 190570856.

It is an arithmetic number, because the mean of its divisors is an integer number (381141708).

Almost surely, 2^1143425121 is an apocalyptic number.

It is an amenable number.

1143425121 is a deficient number, since it is larger than the sum of its proper divisors (381141711).

1143425121 is an equidigital number, since it uses as much as digits as its factorization.

1143425121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381141710.

The product of its digits is 960, while the sum is 24.

The square root of 1143425121 is about 33814.5696556972. The cubic root of 1143425121 is about 1045.6890889367.

Adding to 1143425121 its reverse (1215243411), we get a palindrome (2358668532).

The spelling of 1143425121 in words is "one billion, one hundred forty-three million, four hundred twenty-five thousand, one hundred twenty-one".