140645 has 8 divisors (see below), whose sum is σ = 176256. Its totient is φ = 107536.

The previous prime is 140639. The next prime is 140659. The reversal of 140645 is 546041.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140645 - 2⁴ = 140629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497 + ... + 726.

It is an arithmetic number, because the mean of its divisors is an integer number (22032).

2¹⁴⁰⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

140645 is a deficient number, since it is larger than the sum of its proper divisors (35611).

140645 is a wasteful number, since it uses less digits than its factorization.

140645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 140645 is about 375.0266657186. The cubic root of 140645 is about 52.0045607440.

Subtracting from 140645 its sum of digits (20), we obtain a square (140625 = 375²).

Adding to 140645 its reverse (546041), we get a palindrome (686686).

The spelling of 140645 in words is "one hundred forty thousand, six hundred forty-five".