42186812 has 6 divisors (see below), whose sum is σ = 73826928. Its totient is φ = 21093404.

The previous prime is 42186803. The next prime is 42186857. The reversal of 42186812 is 21868124.

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 as a sum of consecutive naturals, namely, 5273348 + ... + 5273355.

It is an arithmetic number, because the mean of its divisors is an integer number (12304488).

Almost surely, 2^42186812 is an apocalyptic number.

It is an amenable number.

42186812 is a deficient number, since it is larger than the sum of its proper divisors (31640116).

42186812 is a wasteful number, since it uses less digits than its factorization.

42186812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10546707 (or 10546705 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 42186812 is about 6495.1375659027. The cubic root of 42186812 is about 348.1172701177.

The spelling of 42186812 in words is "forty-two million, one hundred eighty-six thousand, eight hundred twelve".