242355661 has 8 divisors (see below), whose sum is σ = 251374104. Its totient is φ = 233467200.

The previous prime is 242355653. The next prime is 242355667. The reversal of 242355661 is 166553242.

It can be written as a sum of positive squares in 4 ways, for example, as 184443561 + 57912100 = 13581^2 + 7610^2 .

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 242355661 - 2³ = 242355653 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 (242355667) 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, 28690 + ... + 36163.

It is an arithmetic number, because the mean of its divisors is an integer number (31421763).

Almost surely, 2^242355661 is an apocalyptic number.

It is an amenable number.

242355661 is a deficient number, since it is larger than the sum of its proper divisors (9018443).

242355661 is a wasteful number, since it uses less digits than its factorization.

242355661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64991.

The product of its digits is 43200, while the sum is 34.

The square root of 242355661 is about 15567.7763665849. The cubic root of 242355661 is about 623.4731034970.

The spelling of 242355661 in words is "two hundred forty-two million, three hundred fifty-five thousand, six hundred sixty-one".