1344021543 has 12 divisors (see below), whose sum is σ = 1959509448. Its totient is φ = 887639760.

The previous prime is 1344021521. The next prime is 1344021587. The reversal of 1344021543 is 3451204431.

It is a happy number.

1344021543 is a `hidden beast` number, since 1 + 3 + 440 + 215 + 4 + 3 = 666.

It is not a de Polignac number, because 1344021543 - 2¹² = 1344017447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1344021143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 696868 + ... + 698793.

It is an arithmetic number, because the mean of its divisors is an integer number (163292454).

Almost surely, 2^1344021543 is an apocalyptic number.

1344021543 is a deficient number, since it is larger than the sum of its proper divisors (615487905).

1344021543 is a wasteful number, since it uses less digits than its factorization.

1344021543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395774 (or 1395771 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1344021543 is about 36660.8993752199. The cubic root of 1344021543 is about 1103.5755669003.

Adding to 1344021543 its reverse (3451204431), we get a palindrome (4795225974).

The spelling of 1344021543 in words is "one billion, three hundred forty-four million, twenty-one thousand, five hundred forty-three".