140418 has 24 divisors (see below), whose sum is σ = 315900. Its totient is φ = 45024.

The previous prime is 140417. The next prime is 140419. The reversal of 140418 is 814041.

It is an interprime number because it is at equal distance from previous prime (140417) and next prime (140419).

It can be written as a sum of positive squares in 2 ways, for example, as 131769 + 8649 = 363^2 + 93^2 .

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

It is a Curzon number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 140418.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140418.

It is not an unprimeable number, because it can be changed into a prime (140411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 388 + ... + 656.

2¹⁴⁰⁴¹⁸ is an apocalyptic number.

140418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 140418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157950).

140418 is an abundant number, since it is smaller than the sum of its proper divisors (175482).

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

140418 is a wasteful number, since it uses less digits than its factorization.

140418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 140418 is about 374.7238983572. The cubic root of 140418 is about 51.9765673515.

Adding to 140418 its reverse (814041), we get a palindrome (954459).

The spelling of 140418 in words is "one hundred forty thousand, four hundred eighteen".