241661 has 16 divisors (see below), whose sum is σ = 307200. Its totient is φ = 185328.

The previous prime is 241651. The next prime is 241663. The reversal of 241661 is 166142.

241661 = 35² + 36² + ... + 91².

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 241661 - 2⁶ = 241597 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 241661.

It is not an unprimeable number, because it can be changed into a prime (241663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3020 + ... + 3098.

It is an arithmetic number, because the mean of its divisors is an integer number (19200).

2²⁴¹⁶⁶¹ is an apocalyptic number.

It is an amenable number.

241661 is a deficient number, since it is larger than the sum of its proper divisors (65539).

241661 is a wasteful number, since it uses less digits than its factorization.

241661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128.

The product of its digits is 288, while the sum is 20.

The square root of 241661 is about 491.5902765515. The cubic root of 241661 is about 62.2876849069.

The spelling of 241661 in words is "two hundred forty-one thousand, six hundred sixty-one".