1101278543 has 2 divisors, whose sum is σ = 1101278544. Its totient is φ = 1101278542.

The previous prime is 1101278527. The next prime is 1101278569. The reversal of 1101278543 is 3458721011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1101278543 - 2⁴ = 1101278527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101277543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550639271 + 550639272.

It is an arithmetic number, because the mean of its divisors is an integer number (550639272).

Almost surely, 2^1101278543 is an apocalyptic number.

1101278543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101278543 is an equidigital number, since it uses as much as digits as its factorization.

1101278543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1101278543 is about 33185.5170669375. The cubic root of 1101278543 is about 1032.6799043958.

Adding to 1101278543 its reverse (3458721011), we get a palindrome (4559999554).

The spelling of 1101278543 in words is "one billion, one hundred one million, two hundred seventy-eight thousand, five hundred forty-three".