242121007 has 8 divisors (see below), whose sum is σ = 249076016. Its totient is φ = 235187712.

The previous prime is 242121001. The next prime is 242121041. The reversal of 242121007 is 700121242.

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 a de Polignac number, because none of the positive numbers 2^k-242121007 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 (242121001) 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, 18703 + ... + 28879.

It is an arithmetic number, because the mean of its divisors is an integer number (31134502).

Almost surely, 2^242121007 is an apocalyptic number.

242121007 is a deficient number, since it is larger than the sum of its proper divisors (6955009).

242121007 is a wasteful number, since it uses less digits than its factorization.

242121007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10857.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 242121007 is about 15560.2380123184. The cubic root of 242121007 is about 623.2718184661.

Adding to 242121007 its reverse (700121242), we get a palindrome (942242249).

The spelling of 242121007 in words is "two hundred forty-two million, one hundred twenty-one thousand, seven".