11671543 has 16 divisors (see below), whose sum is σ = 13194720. Its totient is φ = 10249344.

The previous prime is 11671523. The next prime is 11671547. The reversal of 11671543 is 34517611.

It is a cyclic number.

It is not a de Polignac number, because 11671543 - 2⁹ = 11671031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11671547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31105 + ... + 31477.

It is an arithmetic number, because the mean of its divisors is an integer number (824670).

Almost surely, 2^11671543 is an apocalyptic number.

11671543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11671543 is a deficient number, since it is larger than the sum of its proper divisors (1523177).

11671543 is a wasteful number, since it uses less digits than its factorization.

11671543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498.

The product of its digits is 2520, while the sum is 28.

The square root of 11671543 is about 3416.3640028545. The cubic root of 11671543 is about 226.8346651981.

The spelling of 11671543 in words is "eleven million, six hundred seventy-one thousand, five hundred forty-three".