11965534 has 16 divisors (see below), whose sum is σ = 20589408. Its totient is φ = 5108832.

The previous prime is 11965531. The next prime is 11965549. The reversal of 11965534 is 43556911.

It is a self number, because there is not a number n which added to its sum of digits gives 11965534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11965531) 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 7 ways as a sum of consecutive naturals, for example, 2644 + ... + 5560.

It is an arithmetic number, because the mean of its divisors is an integer number (1286838).

Almost surely, 2^11965534 is an apocalyptic number.

11965534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

11965534 is a deficient number, since it is larger than the sum of its proper divisors (8623874).

11965534 is a wasteful number, since it uses less digits than its factorization.

11965534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219.

The product of its digits is 16200, while the sum is 34.

The square root of 11965534 is about 3459.1232993347. The cubic root of 11965534 is about 228.7234509883.

The spelling of 11965534 in words is "eleven million, nine hundred sixty-five thousand, five hundred thirty-four".