42321866 has 16 divisors (see below), whose sum is σ = 64864800. Its totient is φ = 20705328.

The previous prime is 42321859. The next prime is 42321871. The reversal of 42321866 is 66812324.

42321866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42321866² = 3582280683443912, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16925 + ... + 19263.

It is an arithmetic number, because the mean of its divisors is an integer number (4054050).

Almost surely, 2^42321866 is an apocalyptic number.

42321866 is a deficient number, since it is larger than the sum of its proper divisors (22542934).

42321866 is a wasteful number, since it uses less digits than its factorization.

42321866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2533.

The product of its digits is 13824, while the sum is 32.

The square root of 42321866 is about 6505.5258050368. The cubic root of 42321866 is about 348.4883540876.

The spelling of 42321866 in words is "forty-two million, three hundred twenty-one thousand, eight hundred sixty-six".