242849781 has 12 divisors (see below), whose sum is σ = 353546752. Its totient is φ = 160624296.

The previous prime is 242849771. The next prime is 242849797. The reversal of 242849781 is 187948242.

It is not a de Polignac number, because 242849781 - 2⁷ = 242849653 is a prime.

It is a super-2 number, since 2×242849781² = 117952032263495922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242849731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105091 + ... + 107376.

Almost surely, 2^242849781 is an apocalyptic number.

It is an amenable number.

242849781 is a deficient number, since it is larger than the sum of its proper divisors (110696971).

242849781 is a wasteful number, since it uses less digits than its factorization.

242849781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212600 (or 212597 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 242849781 is about 15583.6382465713. The cubic root of 242849781 is about 623.8965327091.

The spelling of 242849781 in words is "two hundred forty-two million, eight hundred forty-nine thousand, seven hundred eighty-one".