242690057 has 2 divisors, whose sum is σ = 242690058. Its totient is φ = 242690056.

The previous prime is 242690053. The next prime is 242690087. The reversal of 242690057 is 750096242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232379536 + 10310521 = 15244^2 + 3211^2 .

It is a cyclic number.

It is not a de Polignac number, because 242690057 - 2² = 242690053 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 242689999 and 242690026.

It is not a weakly prime, because it can be changed into another prime (242690051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121345028 + 121345029.

It is an arithmetic number, because the mean of its divisors is an integer number (121345029).

Almost surely, 2^242690057 is an apocalyptic number.

It is an amenable number.

242690057 is a deficient number, since it is larger than the sum of its proper divisors (1).

242690057 is an equidigital number, since it uses as much as digits as its factorization.

242690057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 242690057 is about 15578.5126696999. The cubic root of 242690057 is about 623.7597223395.

The spelling of 242690057 in words is "two hundred forty-two million, six hundred ninety thousand, fifty-seven".