1143023121 has 6 divisors (see below), whose sum is σ = 1651033410. Its totient is φ = 762015408.

The previous prime is 1143023099. The next prime is 1143023131. The reversal of 1143023121 is 1213203411.

1143023121 is a `hidden beast` number, since 1 + 1 + 430 + 231 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 801512721 + 341510400 = 28311^2 + 18480^2 .

It is not a de Polignac number, because 1143023121 - 2⁹ = 1143022609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1143023094 and 1143023103.

It is not an unprimeable number, because it can be changed into a prime (1143023131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63501276 + ... + 63501293.

It is an arithmetic number, because the mean of its divisors is an integer number (275172235).

Almost surely, 2^1143023121 is an apocalyptic number.

It is an amenable number.

1143023121 is a deficient number, since it is larger than the sum of its proper divisors (508010289).

1143023121 is a wasteful number, since it uses less digits than its factorization.

1143023121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127002575 (or 127002572 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1143023121 is about 33808.6249498556. The cubic root of 1143023121 is about 1045.5665284299.

Adding to 1143023121 its reverse (1213203411), we get a palindrome (2356226532).

The spelling of 1143023121 in words is "one billion, one hundred forty-three million, twenty-three thousand, one hundred twenty-one".