421845155 has 8 divisors (see below), whose sum is σ = 506417184. Its totient is φ = 337340800.

The previous prime is 421845121. The next prime is 421845161. The reversal of 421845155 is 551548124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421845155 - 2⁶ = 421845091 is a prime.

It is a Duffinian number.

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, 2006 + ... + 29115.

It is an arithmetic number, because the mean of its divisors is an integer number (63302148).

Almost surely, 2^421845155 is an apocalyptic number.

421845155 is a deficient number, since it is larger than the sum of its proper divisors (84572029).

421845155 is a wasteful number, since it uses less digits than its factorization.

421845155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33837.

The product of its digits is 32000, while the sum is 35.

The square root of 421845155 is about 20538.8693700505. The cubic root of 421845155 is about 749.9823136570.

The spelling of 421845155 in words is "four hundred twenty-one million, eight hundred forty-five thousand, one hundred fifty-five".