140140 has 72 divisors (see below), whose sum is σ = 402192. Its totient is φ = 40320.

The previous prime is 140123. The next prime is 140143. The reversal of 140140 is 41041.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a plaindrome in base 16.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (140143) 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, 10774 + ... + 10786.

It is an arithmetic number, because the mean of its divisors is an integer number (5586).

2¹⁴⁰¹⁴⁰ is an apocalyptic number.

140140 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 140140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201096).

140140 is an abundant number, since it is smaller than the sum of its proper divisors (262052).

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

140140 is a wasteful number, since it uses less digits than its factorization.

140140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47 (or 38 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 140140 is about 374.3527747994. The cubic root of 140140 is about 51.9422435659.

Adding to 140140 its reverse (41041), we get a palindrome (181181).

Subtracting from 140140 its reverse (41041), we obtain a palindrome (99099).

It can be divided in two parts, 1401 and 40, that added together give a palindrome (1441).

The spelling of 140140 in words is "one hundred forty thousand, one hundred forty", and thus it is an iban number.