140538 has 16 divisors (see below), whose sum is σ = 286560. Its totient is φ = 45936.

The previous prime is 140533. The next prime is 140549. The reversal of 140538 is 835041.

140538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (140533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156 + ... + 552.

It is an arithmetic number, because the mean of its divisors is an integer number (17910).

2¹⁴⁰⁵³⁸ is an apocalyptic number.

140538 is an abundant number, since it is smaller than the sum of its proper divisors (146022).

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

140538 is a wasteful number, since it uses less digits than its factorization.

140538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 140538 is about 374.8839820531. The cubic root of 140538 is about 51.9913693763.

Adding to 140538 its reverse (835041), we get a palindrome (975579).

The spelling of 140538 in words is "one hundred forty thousand, five hundred thirty-eight".