140020 has 12 divisors (see below), whose sum is σ = 294084. Its totient is φ = 56000.

The previous prime is 140009. The next prime is 140053. The reversal of 140020 is 20041.

It can be written as a sum of positive squares in 2 ways, for example, as 54756 + 85264 = 234^2 + 292^2 .

It is an Ulam number.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 139985 and 140012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3481 + ... + 3520.

It is an arithmetic number, because the mean of its divisors is an integer number (24507).

2¹⁴⁰⁰²⁰ is an apocalyptic number.

140020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140020 is an abundant number, since it is smaller than the sum of its proper divisors (154064).

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

140020 is a wasteful number, since it uses less digits than its factorization.

140020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7010 (or 7008 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 140020 is about 374.1924638471. The cubic root of 140020 is about 51.9274135170.

Adding to 140020 its reverse (20041), we get a palindrome (160061).

The spelling of 140020 in words is "one hundred forty thousand, twenty", and thus it is an iban number.