11965481 has 16 divisors (see below), whose sum is σ = 13704768. Its totient is φ = 10348800.

The previous prime is 11965469. The next prime is 11965493. The reversal of 11965481 is 18456911.

It is an interprime number because it is at equal distance from previous prime (11965469) and next prime (11965493).

It is not a de Polignac number, because 11965481 - 2¹⁰ = 11964457 is a prime.

It is a super-2 number, since 2×11965481² = 286345471122722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11965181) 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 15 ways as a sum of consecutive naturals, for example, 19085 + ... + 19701.

It is an arithmetic number, because the mean of its divisors is an integer number (856548).

Almost surely, 2^11965481 is an apocalyptic number.

11965481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11965481 is a deficient number, since it is larger than the sum of its proper divisors (1739287).

11965481 is a wasteful number, since it uses less digits than its factorization.

11965481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712.

The product of its digits is 8640, while the sum is 35.

The square root of 11965481 is about 3459.1156384255. The cubic root of 11965481 is about 228.7231132861.

The spelling of 11965481 in words is "eleven million, nine hundred sixty-five thousand, four hundred eighty-one".