421622775 has 144 divisors (see below), whose sum is σ = 917369856. Its totient is φ = 180956160.

The previous prime is 421622771. The next prime is 421622777. The reversal of 421622775 is 577226124.

It is a happy number.

421622775 is a `hidden beast` number, since 4 + 21 + 622 + 7 + 7 + 5 = 666.

It is not a de Polignac number, because 421622775 - 2² = 421622771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421622771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3731119 + ... + 3731231.

It is an arithmetic number, because the mean of its divisors is an integer number (6370624).

Almost surely, 2^421622775 is an apocalyptic number.

421622775 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

421622775 is an abundant number, since it is smaller than the sum of its proper divisors (495747081).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421622775 is a wasteful number, since it uses less digits than its factorization.

421622775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 254 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 421622775 is about 20533.4550185788. The cubic root of 421622775 is about 749.8505035364.

Adding to 421622775 its reverse (577226124), we get a palindrome (998848899).

The spelling of 421622775 in words is "four hundred twenty-one million, six hundred twenty-two thousand, seven hundred seventy-five".