421105412 has 54 divisors (see below), whose sum is σ = 928338138. Its totient is φ = 166578048.

The previous prime is 421105409. The next prime is 421105423. The reversal of 421105412 is 214501124.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 31990336 + 389115076 = 5656^2 + 19726^2 .

It is a super-3 number, since 3×421105412³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 26768 + ... + 39480.

It is an arithmetic number, because the mean of its divisors is an integer number (17191447).

Almost surely, 2^421105412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421105412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (464169069).

421105412 is an abundant number, since it is smaller than the sum of its proper divisors (507232726).

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

421105412 is a wasteful number, since it uses less digits than its factorization.

421105412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12757 (or 12735 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 421105412 is about 20520.8531011749. The cubic root of 421105412 is about 749.5436702591.

Adding to 421105412 its reverse (214501124), we get a palindrome (635606536).

The spelling of 421105412 in words is "four hundred twenty-one million, one hundred five thousand, four hundred twelve".