13545144 has 40 divisors (see below), whose sum is σ = 37940760. Its totient is φ = 4514832.

The previous prime is 13545127. The next prime is 13545151. The reversal of 13545144 is 44154531.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9804 + ... + 11099.

It is an arithmetic number, because the mean of its divisors is an integer number (948519).

Almost surely, 2^13545144 is an apocalyptic number.

It is an amenable number.

13545144 is an abundant number, since it is smaller than the sum of its proper divisors (24395616).

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

13545144 is a wasteful number, since it uses less digits than its factorization.

13545144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20921 (or 20908 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 13545144 is about 3680.3728072031. The cubic root of 13545144 is about 238.3752759520.

Adding to 13545144 its reverse (44154531), we get a palindrome (57699675).

It can be divided in two parts, 13545 and 144, that added together give a square (13689 = 117²).

The spelling of 13545144 in words is "thirteen million, five hundred forty-five thousand, one hundred forty-four".