242981197 has 4 divisors (see below), whose sum is σ = 244590496. Its totient is φ = 241371900.

The previous prime is 242981191. The next prime is 242981201. The reversal of 242981197 is 791189242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 242981197 - 2¹⁵ = 242948429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242981191) 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 3 ways as a sum of consecutive naturals, for example, 804423 + ... + 804724.

It is an arithmetic number, because the mean of its divisors is an integer number (61147624).

Almost surely, 2^242981197 is an apocalyptic number.

It is an amenable number.

242981197 is a deficient number, since it is larger than the sum of its proper divisors (1609299).

242981197 is a wasteful number, since it uses less digits than its factorization.

242981197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609298.

The product of its digits is 72576, while the sum is 43.

The square root of 242981197 is about 15587.8541499464. The cubic root of 242981197 is about 624.0090511028.

The spelling of 242981197 in words is "two hundred forty-two million, nine hundred eighty-one thousand, one hundred ninety-seven".