421056818 has 64 divisors (see below), whose sum is σ = 824506368. Its totient is φ = 156764160.

The previous prime is 421056803. The next prime is 421056841. The reversal of 421056818 is 818650124.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207746 + ... + 209762.

It is an arithmetic number, because the mean of its divisors is an integer number (12882912).

Almost surely, 2^421056818 is an apocalyptic number.

421056818 is a deficient number, since it is larger than the sum of its proper divisors (403449550).

421056818 is a wasteful number, since it uses less digits than its factorization.

421056818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 421056818 is about 20519.6690519121. The cubic root of 421056818 is about 749.5148376317.

The spelling of 421056818 in words is "four hundred twenty-one million, fifty-six thousand, eight hundred eighteen".