242994457 has 2 divisors, whose sum is σ = 242994458. Its totient is φ = 242994456.

The previous prime is 242994431. The next prime is 242994497. The reversal of 242994457 is 754499242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122412096 + 120582361 = 11064^2 + 10981^2 .

It is a cyclic number.

It is not a de Polignac number, because 242994457 - 2¹⁹ = 242470169 is a prime.

It is a super-2 number, since 2×242994457² = 118092612265449698, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242994497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121497228 + 121497229.

It is an arithmetic number, because the mean of its divisors is an integer number (121497229).

Almost surely, 2^242994457 is an apocalyptic number.

It is an amenable number.

242994457 is a deficient number, since it is larger than the sum of its proper divisors (1).

242994457 is an equidigital number, since it uses as much as digits as its factorization.

242994457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 46.

The square root of 242994457 is about 15588.2794752981. The cubic root of 242994457 is about 624.0204020628.

The spelling of 242994457 in words is "two hundred forty-two million, nine hundred ninety-four thousand, four hundred fifty-seven".