42128101 has 8 divisors (see below), whose sum is σ = 43712000. Its totient is φ = 40558320.

The previous prime is 42128083. The next prime is 42128113. The reversal of 42128101 is 10182124.

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 42128101 - 2⁵ = 42128069 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 (42128131) 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, 2755 + ... + 9583.

It is an arithmetic number, because the mean of its divisors is an integer number (5464000).

Almost surely, 2^42128101 is an apocalyptic number.

It is an amenable number.

42128101 is a deficient number, since it is larger than the sum of its proper divisors (1583899).

42128101 is a wasteful number, since it uses less digits than its factorization.

42128101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7059.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 42128101 is about 6490.6163805913. The cubic root of 42128101 is about 347.9557046056.

The spelling of 42128101 in words is "forty-two million, one hundred twenty-eight thousand, one hundred one".