141661 has 8 divisors (see below), whose sum is σ = 161784. Its totient is φ = 122880.

The previous prime is 141653. The next prime is 141667. The reversal of 141661 is 166141.

It is a happy number.

141661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 42436 + 99225 = 206^2 + 315^2 .

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

It is a 7-Lehmer number, since φ(141661) divides (141661-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 141661 - 2³ = 141653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (141667) 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, 100 + ... + 541.

It is an arithmetic number, because the mean of its divisors is an integer number (20223).

2¹⁴¹⁶⁶¹ is an apocalyptic number.

It is an amenable number.

141661 is a deficient number, since it is larger than the sum of its proper divisors (20123).

141661 is a wasteful number, since it uses less digits than its factorization.

141661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671.

The product of its digits is 144, while the sum is 19.

The square root of 141661 is about 376.3787985527. The cubic root of 141661 is about 52.1294849946.

The spelling of 141661 in words is "one hundred forty-one thousand, six hundred sixty-one".