13143240 has 96 divisors (see below), whose sum is σ = 46612800. Its totient is φ = 3185280.

The previous prime is 13143239. The next prime is 13143241. The reversal of 13143240 is 4234131.

It is an interprime number because it is at equal distance from previous prime (13143239) and next prime (13143241).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2301 + ... + 5619.

It is an arithmetic number, because the mean of its divisors is an integer number (485550).

Almost surely, 2^13143240 is an apocalyptic number.

13143240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13143240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23306400).

13143240 is an abundant number, since it is smaller than the sum of its proper divisors (33469560).

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

13143240 is a wasteful number, since it uses less digits than its factorization.

13143240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347 (or 3340 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13143240 is about 3625.3606717125. The cubic root of 13143240 is about 235.9939192152.

Adding to 13143240 its reverse (4234131), we get a palindrome (17377371).

It can be divided in two parts, 1314 and 3240, that added together give a palindrome (4554).

The spelling of 13143240 in words is "thirteen million, one hundred forty-three thousand, two hundred forty".