42128620 has 12 divisors (see below), whose sum is σ = 88470144. Its totient is φ = 16851440.

The previous prime is 42128579. The next prime is 42128621. The reversal of 42128620 is 2682124.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (42128621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1053196 + ... + 1053235.

It is an arithmetic number, because the mean of its divisors is an integer number (7372512).

Almost surely, 2^42128620 is an apocalyptic number.

It is an amenable number.

42128620 is an abundant number, since it is smaller than the sum of its proper divisors (46341524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42128620 is a wasteful number, since it uses less digits than its factorization.

42128620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106440 (or 2106438 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 42128620 is about 6490.6563612627. The cubic root of 42128620 is about 347.9571334877.

The spelling of 42128620 in words is "forty-two million, one hundred twenty-eight thousand, six hundred twenty".