1145243143 has 16 divisors (see below), whose sum is σ = 1263799584. Its totient is φ = 1029160960.

The previous prime is 1145243093. The next prime is 1145243173. The reversal of 1145243143 is 3413425411.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1145243143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145243173) 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, 385821 + ... + 388777.

It is an arithmetic number, because the mean of its divisors is an integer number (78987474).

Almost surely, 2^1145243143 is an apocalyptic number.

1145243143 is a deficient number, since it is larger than the sum of its proper divisors (118556441).

1145243143 is a wasteful number, since it uses less digits than its factorization.

1145243143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362.

The product of its digits is 5760, while the sum is 28.

The square root of 1145243143 is about 33841.4412074900. The cubic root of 1145243143 is about 1046.2430033880.

Adding to 1145243143 its reverse (3413425411), we get a palindrome (4558668554).

The spelling of 1145243143 in words is "one billion, one hundred forty-five million, two hundred forty-three thousand, one hundred forty-three".