1216740543 has 8 divisors (see below), whose sum is σ = 1628634288. Its totient is φ = 808003584.

The previous prime is 1216740517. The next prime is 1216740571. The reversal of 1216740543 is 3450476121.

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

It is not a de Polignac number, because 1216740543 - 2¹⁰ = 1216739519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216740583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 788296 + ... + 789837.

It is an arithmetic number, because the mean of its divisors is an integer number (203579286).

Almost surely, 2^1216740543 is an apocalyptic number.

1216740543 is a deficient number, since it is larger than the sum of its proper divisors (411893745).

1216740543 is a wasteful number, since it uses less digits than its factorization.

1216740543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578393.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 1216740543 is about 34881.8081956770. The cubic root of 1216740543 is about 1067.5772894402.

The spelling of 1216740543 in words is "one billion, two hundred sixteen million, seven hundred forty thousand, five hundred forty-three".