42175816 has 8 divisors (see below), whose sum is σ = 79079670. Its totient is φ = 21087904.

The previous prime is 42175799. The next prime is 42175829. The reversal of 42175816 is 61857124.

It can be written as a sum of positive squares in only one way, i.e., 21436900 + 20738916 = 4630^2 + 4554^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2635981 + ... + 2635996.

Almost surely, 2^42175816 is an apocalyptic number.

It is an amenable number.

42175816 is a deficient number, since it is larger than the sum of its proper divisors (36903854).

42175816 is a wasteful number, since it uses less digits than its factorization.

42175816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5271983 (or 5271979 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 42175816 is about 6494.2910313598. The cubic root of 42175816 is about 348.0870218802.

The spelling of 42175816 in words is "forty-two million, one hundred seventy-five thousand, eight hundred sixteen".