421422144 has 112 divisors (see below), whose sum is σ = 1310030400. Its totient is φ = 117872640.

The previous prime is 421422143. The next prime is 421422151. The reversal of 421422144 is 441224124.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421422143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19782 + ... + 35130.

It is an arithmetic number, because the mean of its divisors is an integer number (11696700).

Almost surely, 2^421422144 is an apocalyptic number.

421422144 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421422144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (655015200).

421422144 is an abundant number, since it is smaller than the sum of its proper divisors (888608256).

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

421422144 is a wasteful number, since it uses less digits than its factorization.

421422144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15388 (or 15378 counting only the distinct ones).

The product of its digits is 2048, while the sum is 24.

The square root of 421422144 is about 20528.5689710705. The cubic root of 421422144 is about 749.7315448094.

Adding to 421422144 its reverse (441224124), we get a palindrome (862646268).

The spelling of 421422144 in words is "four hundred twenty-one million, four hundred twenty-two thousand, one hundred forty-four".