242661 has 8 divisors (see below), whose sum is σ = 330624. Its totient is φ = 158240.

The previous prime is 242659. The next prime is 242677. The reversal of 242661 is 166242.

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 242661 - 2¹ = 242659 is a prime.

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 242661.

It is not an unprimeable number, because it can be changed into a prime (242621) 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, 720 + ... + 1001.

It is an arithmetic number, because the mean of its divisors is an integer number (41328).

2²⁴²⁶⁶¹ is an apocalyptic number.

It is an amenable number.

242661 is a deficient number, since it is larger than the sum of its proper divisors (87963).

242661 is a wasteful number, since it uses less digits than its factorization.

242661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771.

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

The square root of 242661 is about 492.6063336986. The cubic root of 242661 is about 62.3734827336.

It can be divided in two parts, 242 and 661, that added together give a triangular number (903 = T₄₂).

The spelling of 242661 in words is "two hundred forty-two thousand, six hundred sixty-one".