11143539 has 24 divisors (see below), whose sum is σ = 18130944. Its totient is φ = 6534000.

The previous prime is 11143499. The next prime is 11143547. The reversal of 11143539 is 93534111.

11143539 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 11143539 - 2⁷ = 11143411 is a prime.

It is a super-2 number, since 2×11143539² = 248356922889042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11143589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1254 + ... + 4884.

It is an arithmetic number, because the mean of its divisors is an integer number (755456).

Almost surely, 2^11143539 is an apocalyptic number.

11143539 is a deficient number, since it is larger than the sum of its proper divisors (6987405).

11143539 is a wasteful number, since it uses less digits than its factorization.

11143539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3679 (or 3676 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 11143539 is about 3338.1939727943. The cubic root of 11143539 is about 223.3611888228.

The spelling of 11143539 in words is "eleven million, one hundred forty-three thousand, five hundred thirty-nine".