42128655 has 32 divisors (see below), whose sum is σ = 69189120. Its totient is φ = 21882240.

The previous prime is 42128651. The next prime is 42128657. The reversal of 42128655 is 55682124.

It is not a de Polignac number, because 42128655 - 2² = 42128651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42128651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160054 + ... + 160316.

It is an arithmetic number, because the mean of its divisors is an integer number (2162160).

Almost surely, 2^42128655 is an apocalyptic number.

42128655 is a deficient number, since it is larger than the sum of its proper divisors (27060465).

42128655 is a wasteful number, since it uses less digits than its factorization.

42128655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511.

The product of its digits is 19200, while the sum is 33.

The square root of 42128655 is about 6490.6590574456. The cubic root of 42128655 is about 347.9572298474.

The spelling of 42128655 in words is "forty-two million, one hundred twenty-eight thousand, six hundred fifty-five".