42145216 has 28 divisors (see below), whose sum is σ = 84035392. Its totient is φ = 20971008.

The previous prime is 42145153. The next prime is 42145241. The reversal of 42145216 is 61254124.

It is a happy number.

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, 12796 + ... + 15748.

It is an arithmetic number, because the mean of its divisors is an integer number (3001264).

Almost surely, 2^42145216 is an apocalyptic number.

It is an amenable number.

42145216 is a deficient number, since it is larger than the sum of its proper divisors (41890176).

42145216 is a wasteful number, since it uses less digits than its factorization.

42145216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3188 (or 3178 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 42145216 is about 6491.9346885193. The cubic root of 42145216 is about 348.0028184913.

The spelling of 42145216 in words is "forty-two million, one hundred forty-five thousand, two hundred sixteen".