242121313 has 8 divisors (see below), whose sum is σ = 291273920. Its totient is φ = 196609680.

The previous prime is 242121311. The next prime is 242121323. The reversal of 242121313 is 313121242.

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 242121313 - 2¹ = 242121311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (242121311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 910098 + ... + 910363.

It is an arithmetic number, because the mean of its divisors is an integer number (36409240).

Almost surely, 2^242121313 is an apocalyptic number.

It is an amenable number.

242121313 is a deficient number, since it is larger than the sum of its proper divisors (49152607).

242121313 is a wasteful number, since it uses less digits than its factorization.

242121313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820487.

The product of its digits is 288, while the sum is 19.

The square root of 242121313 is about 15560.2478450698. The cubic root of 242121313 is about 623.2720810361.

Adding to 242121313 its reverse (313121242), we get a palindrome (555242555).

The spelling of 242121313 in words is "two hundred forty-two million, one hundred twenty-one thousand, three hundred thirteen".