1101305243 has 4 divisors (see below), whose sum is σ = 1101633408. Its totient is φ = 1100977080.

The previous prime is 1101305239. The next prime is 1101305263. The reversal of 1101305243 is 3425031011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1101305243 - 2² = 1101305239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101305263) 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, 158996 + ... + 165777.

It is an arithmetic number, because the mean of its divisors is an integer number (275408352).

Almost surely, 2^1101305243 is an apocalyptic number.

1101305243 is a deficient number, since it is larger than the sum of its proper divisors (328165).

1101305243 is an equidigital number, since it uses as much as digits as its factorization.

1101305243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328164.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1101305243 is about 33185.9193484225. The cubic root of 1101305243 is about 1032.6882499474.

Adding to 1101305243 its reverse (3425031011), we get a palindrome (4526336254).

The spelling of 1101305243 in words is "one billion, one hundred one million, three hundred five thousand, two hundred forty-three".