140661 has 6 divisors (see below), whose sum is σ = 203190. Its totient is φ = 93768.

The previous prime is 140659. The next prime is 140663. The reversal of 140661 is 166041.

140661 is a `hidden beast` number, since 1 + 4 + 0 + 661 = 666.

140661 is nontrivially palindromic in base 14.

140661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (140659) and next prime (140663).

It can be written as a sum of positive squares in only one way, i.e., 140625 + 36 = 375^2 + 6^2 .

It is not a de Polignac number, because 140661 - 2¹ = 140659 is a prime.

140661 is an undulating number in base 14.

140661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7806 + ... + 7823.

It is an arithmetic number, because the mean of its divisors is an integer number (33865).

2¹⁴⁰⁶⁶¹ is an apocalyptic number.

It is an amenable number.

140661 is a deficient number, since it is larger than the sum of its proper divisors (62529).

140661 is a wasteful number, since it uses less digits than its factorization.

140661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15635 (or 15632 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 140661 is about 375.0479969284. The cubic root of 140661 is about 52.0065327098.

The spelling of 140661 in words is "one hundred forty thousand, six hundred sixty-one".