13161144 has 32 divisors (see below), whose sum is σ = 33304320. Its totient is φ = 4333536.

The previous prime is 13161133. The next prime is 13161149. The reversal of 13161144 is 44116131.

It is a super-2 number, since 2×13161144² = 346431422777472, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 13161144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13161149) 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 7 ways as a sum of consecutive naturals, for example, 1312 + ... + 5295.

It is an arithmetic number, because the mean of its divisors is an integer number (1040760).

Almost surely, 2^13161144 is an apocalyptic number.

It is an amenable number.

13161144 is an abundant number, since it is smaller than the sum of its proper divisors (20143176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13161144 is a wasteful number, since it uses less digits than its factorization.

13161144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6699 (or 6695 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 13161144 is about 3627.8291029209. The cubic root of 13161144 is about 236.1010292330.

Adding to 13161144 its reverse (44116131), we get a palindrome (57277275).

The spelling of 13161144 in words is "thirteen million, one hundred sixty-one thousand, one hundred forty-four".