421445055 has 32 divisors (see below), whose sum is σ = 683679744. Its totient is φ = 221671296.

The previous prime is 421445051. The next prime is 421445069. The reversal of 421445055 is 550544124.

It is not a de Polignac number, because 421445055 - 2² = 421445051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421445051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 374724 + ... + 375846.

It is an arithmetic number, because the mean of its divisors is an integer number (21364992).

Almost surely, 2^421445055 is an apocalyptic number.

421445055 is a deficient number, since it is larger than the sum of its proper divisors (262234689).

421445055 is a wasteful number, since it uses less digits than its factorization.

421445055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455.

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 421445055 is about 20529.1269906930. The cubic root of 421445055 is about 749.7451311768.

Adding to 421445055 its reverse (550544124), we get a palindrome (971989179).

The spelling of 421445055 in words is "four hundred twenty-one million, four hundred forty-five thousand, fifty-five".