242192921 has 16 divisors (see below), whose sum is σ = 257233536. Its totient is φ = 227563776.

The previous prime is 242192917. The next prime is 242192953. The reversal of 242192921 is 129291242.

It is a cyclic number.

It is not a de Polignac number, because 242192921 - 2² = 242192917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (242192521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 559121 + ... + 559553.

It is an arithmetic number, because the mean of its divisors is an integer number (16077096).

Almost surely, 2^242192921 is an apocalyptic number.

It is an amenable number.

242192921 is a deficient number, since it is larger than the sum of its proper divisors (15040615).

242192921 is a wasteful number, since it uses less digits than its factorization.

242192921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832.

The product of its digits is 5184, while the sum is 32.

The square root of 242192921 is about 15562.5486665906. The cubic root of 242192921 is about 623.3335197524. Note that the first 3 decimals are identical.

The spelling of 242192921 in words is "two hundred forty-two million, one hundred ninety-two thousand, nine hundred twenty-one".