242040257 has 2 divisors, whose sum is σ = 242040258. Its totient is φ = 242040256.

The previous prime is 242040251. The next prime is 242040263. The reversal of 242040257 is 752040242.

It is a balanced prime because it is at equal distance from previous prime (242040251) and next prime (242040263).

It can be written as a sum of positive squares in only one way, i.e., 226231681 + 15808576 = 15041^2 + 3976^2 .

It is a cyclic number.

It is not a de Polignac number, because 242040257 - 2¹⁸ = 241778113 is a prime.

It is not a weakly prime, because it can be changed into another prime (242040251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121020128 + 121020129.

It is an arithmetic number, because the mean of its divisors is an integer number (121020129).

Almost surely, 2^242040257 is an apocalyptic number.

It is an amenable number.

242040257 is a deficient number, since it is larger than the sum of its proper divisors (1).

242040257 is an equidigital number, since it uses as much as digits as its factorization.

242040257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 242040257 is about 15557.6430412836. The cubic root of 242040257 is about 623.2025214424.

Adding to 242040257 its reverse (752040242), we get a palindrome (994080499).

The spelling of 242040257 in words is "two hundred forty-two million, forty thousand, two hundred fifty-seven".