242540101 has 2 divisors, whose sum is σ = 242540102. Its totient is φ = 242540100.

The previous prime is 242540099. The next prime is 242540107. The reversal of 242540101 is 101045242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176199076 + 66341025 = 13274^2 + 8145^2 .

It is a cyclic number.

It is not a de Polignac number, because 242540101 - 2¹ = 242540099 is a prime.

Together with 242540099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242540107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121270050 + 121270051.

It is an arithmetic number, because the mean of its divisors is an integer number (121270051).

Almost surely, 2^242540101 is an apocalyptic number.

It is an amenable number.

242540101 is a deficient number, since it is larger than the sum of its proper divisors (1).

242540101 is an equidigital number, since it uses as much as digits as its factorization.

242540101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 242540101 is about 15573.6990146850. The cubic root of 242540101 is about 623.6312240321.

Adding to 242540101 its reverse (101045242), we get a palindrome (343585343).

The spelling of 242540101 in words is "two hundred forty-two million, five hundred forty thousand, one hundred one".