242581237 has 2 divisors, whose sum is σ = 242581238. Its totient is φ = 242581236.

The previous prime is 242581217. The next prime is 242581267. The reversal of 242581237 is 732185242.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142301041 + 100280196 = 11929^2 + 10014^2 .

It is a cyclic number.

It is not a de Polignac number, because 242581237 - 2²⁷ = 108363509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242581217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121290618 + 121290619.

It is an arithmetic number, because the mean of its divisors is an integer number (121290619).

Almost surely, 2^242581237 is an apocalyptic number.

It is an amenable number.

242581237 is a deficient number, since it is larger than the sum of its proper divisors (1).

242581237 is an equidigital number, since it uses as much as digits as its factorization.

242581237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 34.

The square root of 242581237 is about 15575.0196468576. The cubic root of 242581237 is about 623.6664790184. Note that the first 3 decimals are identical.

The spelling of 242581237 in words is "two hundred forty-two million, five hundred eighty-one thousand, two hundred thirty-seven".