1220240543 has 8 divisors (see below), whose sum is σ = 1226800512. Its totient is φ = 1213691416.

The previous prime is 1220240531. The next prime is 1220240561. The reversal of 1220240543 is 3450420221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220240543 - 2¹⁰ = 1220239519 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 (1220240143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322046 + ... + 325812.

It is an arithmetic number, because the mean of its divisors is an integer number (153350064).

Almost surely, 2^1220240543 is an apocalyptic number.

1220240543 is a deficient number, since it is larger than the sum of its proper divisors (6559969).

1220240543 is a wasteful number, since it uses less digits than its factorization.

1220240543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5421.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1220240543 is about 34931.9415864621. The cubic root of 1220240543 is about 1068.5999515850.

Adding to 1220240543 its reverse (3450420221), we get a palindrome (4670660764).

The spelling of 1220240543 in words is "one billion, two hundred twenty million, two hundred forty thousand, five hundred forty-three".