11121543 has 10 divisors (see below), whose sum is σ = 16613784. Its totient is φ = 7414308.

The previous prime is 11121533. The next prime is 11121547. The reversal of 11121543 is 34512111.

11121543 is a `hidden beast` number, since 1 + 1 + 121 + 543 = 666.

It is not a de Polignac number, because 11121543 - 2⁴ = 11121527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 68571 + ... + 68732.

Almost surely, 2^11121543 is an apocalyptic number.

11121543 is a deficient number, since it is larger than the sum of its proper divisors (5492241).

11121543 is an equidigital number, since it uses as much as digits as its factorization.

11121543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137315 (or 137306 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 11121543 is about 3334.8977495569. The cubic root of 11121543 is about 223.2141293518.

Adding to 11121543 its reverse (34512111), we get a palindrome (45633654).

It can be divided in two parts, 11121 and 543, that added together give a square (11664 = 108²).

The spelling of 11121543 in words is "eleven million, one hundred twenty-one thousand, five hundred forty-three".