1143120161 has 8 divisors (see below), whose sum is σ = 1209936000. Its totient is φ = 1076969520.

The previous prime is 1143120157. The next prime is 1143120179. The reversal of 1143120161 is 1610213411.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1143120161 - 2² = 1143120157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143120101) 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, 162761 + ... + 169638.

It is an arithmetic number, because the mean of its divisors is an integer number (151242000).

Almost surely, 2^1143120161 is an apocalyptic number.

It is an amenable number.

1143120161 is a deficient number, since it is larger than the sum of its proper divisors (66815839).

1143120161 is a wasteful number, since it uses less digits than its factorization.

1143120161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332599.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1143120161 is about 33810.0600561431. The cubic root of 1143120161 is about 1045.5961163134.

Adding to 1143120161 its reverse (1610213411), we get a palindrome (2753333572).

The spelling of 1143120161 in words is "one billion, one hundred forty-three million, one hundred twenty thousand, one hundred sixty-one".