42021066 has 16 divisors (see below), whose sum is σ = 85226688. Its totient is φ = 13809600.

The previous prime is 42021043. The next prime is 42021071. The reversal of 42021066 is 66012024.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48895 + ... + 49746.

It is an arithmetic number, because the mean of its divisors is an integer number (5326668).

Almost surely, 2^42021066 is an apocalyptic number.

42021066 is an abundant number, since it is smaller than the sum of its proper divisors (43205622).

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

42021066 is a wasteful number, since it uses less digits than its factorization.

42021066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98717.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 42021066 is about 6482.3657718460. The cubic root of 42021066 is about 347.6607706299.

The spelling of 42021066 in words is "forty-two million, twenty-one thousand, sixty-six".