13143504 has 120 divisors (see below), whose sum is σ = 39053056. Its totient is φ = 3801600.

The previous prime is 13143491. The next prime is 13143539. The reversal of 13143504 is 40534131.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180012 + ... + 180084.

Almost surely, 2^13143504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13143504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19526528).

13143504 is an abundant number, since it is smaller than the sum of its proper divisors (25909552).

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

13143504 is a wasteful number, since it uses less digits than its factorization.

13143504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 13143504 is about 3625.3970817002. The cubic root of 13143504 is about 235.9954992917.

Adding to 13143504 its reverse (40534131), we get a palindrome (53677635).

The spelling of 13143504 in words is "thirteen million, one hundred forty-three thousand, five hundred four".