140646 has 16 divisors (see below), whose sum is σ = 307008. Its totient is φ = 42600.

The previous prime is 140639. The next prime is 140659. The reversal of 140646 is 646041.

140646 is nontrivially palindromic in base 5.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140646.

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, 1000 + ... + 1131.

It is an arithmetic number, because the mean of its divisors is an integer number (19188).

2¹⁴⁰⁶⁴⁶ is an apocalyptic number.

140646 is an abundant number, since it is smaller than the sum of its proper divisors (166362).

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

140646 is a wasteful number, since it uses less digits than its factorization.

140646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 140646 is about 375.0279989547. The cubic root of 140646 is about 52.0046839962.

Subtracting from 140646 its sum of digits (21), we obtain a square (140625 = 375²).

Adding to 140646 its reverse (646041), we get a palindrome (786687).

The spelling of 140646 in words is "one hundred forty thousand, six hundred forty-six".