1355440543 has 4 divisors (see below), whose sum is σ = 1355514568. Its totient is φ = 1355366520.

The previous prime is 1355440529. The next prime is 1355440591. The reversal of 1355440543 is 3450445531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3450445531 = 13 ⋅265418887.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1355440543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1355440499 and 1355440508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355440523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12805 + ... + 53617.

It is an arithmetic number, because the mean of its divisors is an integer number (338878642).

Almost surely, 2^1355440543 is an apocalyptic number.

1355440543 is a deficient number, since it is larger than the sum of its proper divisors (74025).

1355440543 is an equidigital number, since it uses as much as digits as its factorization.

1355440543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74024.

The product of its (nonzero) digits is 72000, while the sum is 34.

The square root of 1355440543 is about 36816.3081120310. The cubic root of 1355440543 is about 1106.6921360427.

The spelling of 1355440543 in words is "one billion, three hundred fifty-five million, four hundred forty thousand, five hundred forty-three".