42668121 has 8 divisors (see below), whose sum is σ = 58726144. Its totient is φ = 27527760.

The previous prime is 42668117. The next prime is 42668123. The reversal of 42668121 is 12186624.

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

It is not a de Polignac number, because 42668121 - 2² = 42668117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42668123) 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, 229306 + ... + 229491.

It is an arithmetic number, because the mean of its divisors is an integer number (7340768).

Almost surely, 2^42668121 is an apocalyptic number.

It is an amenable number.

42668121 is a deficient number, since it is larger than the sum of its proper divisors (16058023).

42668121 is a wasteful number, since it uses less digits than its factorization.

42668121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458831.

The product of its digits is 4608, while the sum is 30.

The square root of 42668121 is about 6532.0839706789. The cubic root of 42668121 is about 349.4361560906.

The spelling of 42668121 in words is "forty-two million, six hundred sixty-eight thousand, one hundred twenty-one".