42128516 has 12 divisors (see below), whose sum is σ = 78061788. Its totient is φ = 19825152.

The previous prime is 42128477. The next prime is 42128549. The reversal of 42128516 is 61582124.

It can be written as a sum of positive squares in 2 ways, for example, as 28408900 + 13719616 = 5330^2 + 3704^2 .

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, 309701 + ... + 309836.

It is an arithmetic number, because the mean of its divisors is an integer number (6505149).

Almost surely, 2^42128516 is an apocalyptic number.

It is an amenable number.

42128516 is a deficient number, since it is larger than the sum of its proper divisors (35933272).

42128516 is a wasteful number, since it uses less digits than its factorization.

42128516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619558 (or 619556 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 42128516 is about 6490.6483497413. The cubic root of 42128516 is about 347.9568471616.

The spelling of 42128516 in words is "forty-two million, one hundred twenty-eight thousand, five hundred sixteen".