421056655 has 16 divisors (see below), whose sum is σ = 523908000. Its totient is φ = 324472960.

The previous prime is 421056637. The next prime is 421056659. The reversal of 421056655 is 556650124.

It is not a de Polignac number, because 421056655 - 2⁹ = 421056143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421056655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421056659) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 63696 + ... + 69994.

It is an arithmetic number, because the mean of its divisors is an integer number (32744250).

Almost surely, 2^421056655 is an apocalyptic number.

421056655 is a deficient number, since it is larger than the sum of its proper divisors (102851345).

421056655 is a wasteful number, since it uses less digits than its factorization.

421056655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6794.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 421056655 is about 20519.6650801128. The cubic root of 421056655 is about 749.5147409140.

The spelling of 421056655 in words is "four hundred twenty-one million, fifty-six thousand, six hundred fifty-five".