1244040543 has 12 divisors (see below), whose sum is σ = 1797460080. Its totient is φ = 829123776.

The previous prime is 1244040461. The next prime is 1244040563. The reversal of 1244040543 is 3450404421.

It is a happy number.

It is not a de Polignac number, because 1244040543 - 2¹³ = 1244032351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244040563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17230 + ... + 52772.

It is an arithmetic number, because the mean of its divisors is an integer number (149788340).

Almost surely, 2^1244040543 is an apocalyptic number.

1244040543 is a deficient number, since it is larger than the sum of its proper divisors (553419537).

1244040543 is a wasteful number, since it uses less digits than its factorization.

1244040543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39438 (or 39435 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 1244040543 is about 35270.9589180674. The cubic root of 1244040543 is about 1075.5027158005.

Adding to 1244040543 its reverse (3450404421), we get a palindrome (4694444964).

The spelling of 1244040543 in words is "one billion, two hundred forty-four million, forty thousand, five hundred forty-three".