142240 has 48 divisors (see below), whose sum is σ = 387072. Its totient is φ = 48384.

The previous prime is 142237. The next prime is 142271. The reversal of 142240 is 42241.

It is a self number, because there is not a number n which added to its sum of digits gives 142240.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1057 + ... + 1183.

It is an arithmetic number, because the mean of its divisors is an integer number (8064).

2¹⁴²²⁴⁰ is an apocalyptic number.

142240 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 142240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193536).

142240 is an abundant number, since it is smaller than the sum of its proper divisors (244832).

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

142240 is a wasteful number, since it uses less digits than its factorization.

142240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 142240 is about 377.1471861223. The cubic root of 142240 is about 52.2004100514.

Adding to 142240 its reverse (42241), we get a palindrome (184481).

Subtracting from 142240 its reverse (42241), we obtain a palindrome (99999).

The spelling of 142240 in words is "one hundred forty-two thousand, two hundred forty", and thus it is an iban number.