1143345321 has 16 divisors (see below), whose sum is σ = 1695851200. Its totient is φ = 761327424.

The previous prime is 1143345283. The next prime is 1143345331. The reversal of 1143345321 is 1235433411.

It is a happy number.

1143345321 is a `hidden beast` number, since 1 + 1 + 4 + 334 + 5 + 321 = 666.

It is not a de Polignac number, because 1143345321 - 2⁶ = 1143345257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143345331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1456 + ... + 47841.

It is an arithmetic number, because the mean of its divisors is an integer number (105990700).

Almost surely, 2^1143345321 is an apocalyptic number.

It is an amenable number.

1143345321 is a deficient number, since it is larger than the sum of its proper divisors (552505879).

1143345321 is an equidigital number, since it uses as much as digits as its factorization.

1143345321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50165 (or 50159 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1143345321 is about 33813.3896703658. The cubic root of 1143345321 is about 1045.6647620469.

Adding to 1143345321 its reverse (1235433411), we get a palindrome (2378778732).

The spelling of 1143345321 in words is "one billion, one hundred forty-three million, three hundred forty-five thousand, three hundred twenty-one".