42128412 has 12 divisors (see below), whose sum is σ = 98299656. Its totient is φ = 14042800.

The previous prime is 42128399. The next prime is 42128467. The reversal of 42128412 is 21482124.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1755339 + ... + 1755362.

It is an arithmetic number, because the mean of its divisors is an integer number (8191638).

Almost surely, 2^42128412 is an apocalyptic number.

It is an amenable number.

42128412 is an abundant number, since it is smaller than the sum of its proper divisors (56171244).

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

42128412 is a wasteful number, since it uses less digits than its factorization.

42128412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510708 (or 3510706 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

The square root of 42128412 is about 6490.6403382101. The cubic root of 42128412 is about 347.9565608350.

The spelling of 42128412 in words is "forty-two million, one hundred twenty-eight thousand, four hundred twelve".