Adding to 143640 its reverse (46341), we get a palindrome (189981).
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143640.
It is an unprimeable number.
143640 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2143640 is an apocalyptic number.
143640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
143640 is the 240-th heptagonal number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 143640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288000).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
143640 is a wasteful number, since it uses less digits than its factorization.
143640 is an evil number, because the sum of its binary digits is even.
The square root of 143640 is about 378.9986807365. The cubic root of 143640 is about 52.3711124111.
The spelling of 143640 in words is "one hundred forty-three thousand, six hundred forty".