42687172 has 24 divisors (see below), whose sum is σ = 85038912. Its totient is φ = 18559200.

The previous prime is 42687157. The next prime is 42687173. The reversal of 42687172 is 27178624.

It is a super-3 number, since 3×42687172³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (42687173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20079 + ... + 22102.

It is an arithmetic number, because the mean of its divisors is an integer number (3543288).

Almost surely, 2^42687172 is an apocalyptic number.

It is an amenable number.

42687172 is a deficient number, since it is larger than the sum of its proper divisors (42351740).

42687172 is a wasteful number, since it uses less digits than its factorization.

42687172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42219 (or 42217 counting only the distinct ones).

The product of its digits is 37632, while the sum is 37.

The square root of 42687172 is about 6533.5420714954. The cubic root of 42687172 is about 349.4881552375.

The spelling of 42687172 in words is "forty-two million, six hundred eighty-seven thousand, one hundred seventy-two".