140658 has 32 divisors (see below), whose sum is σ = 342144. Its totient is φ = 37632.

The previous prime is 140639. The next prime is 140659. The reversal of 140658 is 856041.

140658 is nontrivially palindromic in base 12.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140659) by changing a digit.

140658 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 616 + ... + 812.

It is an arithmetic number, because the mean of its divisors is an integer number (10692).

2¹⁴⁰⁶⁵⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171072).

140658 is an abundant number, since it is smaller than the sum of its proper divisors (201486).

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

140658 is a wasteful number, since it uses less digits than its factorization.

140658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 140658 is about 375.0439974190. The cubic root of 140658 is about 52.0061629776.

Adding to 140658 its reverse (856041), we get a palindrome (996699).

The spelling of 140658 in words is "one hundred forty thousand, six hundred fifty-eight".