242540661 has 16 divisors (see below), whose sum is σ = 362323008. Its totient is φ = 143020800.

The previous prime is 242540657. The next prime is 242540689. The reversal of 242540661 is 166045242.

It is not a de Polignac number, because 242540661 - 2² = 242540657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242540761) 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, 98100 + ... + 100541.

It is an arithmetic number, because the mean of its divisors is an integer number (22645188).

Almost surely, 2^242540661 is an apocalyptic number.

It is an amenable number.

242540661 is a deficient number, since it is larger than the sum of its proper divisors (119782347).

242540661 is a wasteful number, since it uses less digits than its factorization.

242540661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198692.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 242540661 is about 15573.7169937045. The cubic root of 242540661 is about 623.6317039984.

The spelling of 242540661 in words is "two hundred forty-two million, five hundred forty thousand, six hundred sixty-one".