242912191 has 8 divisors (see below), whose sum is σ = 244546560. Its totient is φ = 241283448.

The previous prime is 242912183. The next prime is 242912227. The reversal of 242912191 is 191219242.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 242912191 - 2³ = 242912183 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 (242912161) 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 7 ways as a sum of consecutive naturals, for example, 115350 + ... + 117436.

It is an arithmetic number, because the mean of its divisors is an integer number (30568320).

Almost surely, 2^242912191 is an apocalyptic number.

242912191 is a deficient number, since it is larger than the sum of its proper divisors (1634369).

242912191 is a wasteful number, since it uses less digits than its factorization.

242912191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813.

The product of its digits is 2592, while the sum is 31.

The square root of 242912191 is about 15585.6405386497. The cubic root of 242912191 is about 623.9499732179.

The spelling of 242912191 in words is "two hundred forty-two million, nine hundred twelve thousand, one hundred ninety-one".