1144400543 has 32 divisors (see below), whose sum is σ = 1430618112. Its totient is φ = 899366400.

The previous prime is 1144400531. The next prime is 1144400561. The reversal of 1144400543 is 3450044411.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1144400543 - 2¹⁸ = 1144138399 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144400573) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 541058 + ... + 543168.

It is an arithmetic number, because the mean of its divisors is an integer number (44706816).

Almost surely, 2^1144400543 is an apocalyptic number.

1144400543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1144400543 is a deficient number, since it is larger than the sum of its proper divisors (286217569).

1144400543 is a wasteful number, since it uses less digits than its factorization.

1144400543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1144400543 is about 33828.9896834062. The cubic root of 1144400543 is about 1045.9863531885.

Adding to 1144400543 its reverse (3450044411), we get a palindrome (4594444954).

The spelling of 1144400543 in words is "one billion, one hundred forty-four million, four hundred thousand, five hundred forty-three".