242564491 has 8 divisors (see below), whose sum is σ = 269650304. Its totient is φ = 216682560.

The previous prime is 242564479. The next prime is 242564501. The reversal of 242564491 is 194465242.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-242564491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242564491.

It is not an unprimeable number, because it can be changed into a prime (242504491) 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 in 7 ways as a sum of consecutive naturals, for example, 300546 + ... + 301351.

It is an arithmetic number, because the mean of its divisors is an integer number (33706288).

Almost surely, 2^242564491 is an apocalyptic number.

242564491 is a deficient number, since it is larger than the sum of its proper divisors (27085813).

242564491 is a wasteful number, since it uses less digits than its factorization.

242564491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601941.

The product of its digits is 69120, while the sum is 37.

The square root of 242564491 is about 15574.4820459622. The cubic root of 242564491 is about 623.6521275936.

The spelling of 242564491 in words is "two hundred forty-two million, five hundred sixty-four thousand, four hundred ninety-one".