42143872 has 32 divisors (see below), whose sum is σ = 84293820. Its totient is φ = 20987904.

The previous prime is 42143861. The next prime is 42143887. The reversal of 42143872 is 27834124.

It can be written as a sum of positive squares in 2 ways, for example, as 41267776 + 876096 = 6424^2 + 936^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×42143872² = 3552211894304768, which contains 22 as substring.

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, 42648 + ... + 43624.

Almost surely, 2^42143872 is an apocalyptic number.

It is an amenable number.

42143872 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

42143872 is an equidigital number, since it uses as much as digits as its factorization.

42143872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328 (or 1316 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 42143872 is about 6491.8311746379. The cubic root of 42143872 is about 347.9991192121. Note that the first 3 decimals are identical.

Adding to 42143872 its reverse (27834124), we get a palindrome (69977996).

The spelling of 42143872 in words is "forty-two million, one hundred forty-three thousand, eight hundred seventy-two".