421424244 has 36 divisors (see below), whose sum is σ = 1068929316. Its totient is φ = 139991808.

The previous prime is 421424243. The next prime is 421424257. The reversal of 421424244 is 442424124.

It can be written as a sum of positive squares in 2 ways, for example, as 363359844 + 58064400 = 19062^2 + 7620^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 (421424243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9429 + ... + 30524.

It is an arithmetic number, because the mean of its divisors is an integer number (29692481).

Almost surely, 2^421424244 is an apocalyptic number.

It is an amenable number.

421424244 is an abundant number, since it is smaller than the sum of its proper divisors (647505072).

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

421424244 is a wasteful number, since it uses less digits than its factorization.

421424244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40256 (or 40251 counting only the distinct ones).

The product of its digits is 8192, while the sum is 27.

The square root of 421424244 is about 20528.6201192384. The cubic root of 421424244 is about 749.7327901432.

Adding to 421424244 its reverse (442424124), we get a palindrome (863848368).

The spelling of 421424244 in words is "four hundred twenty-one million, four hundred twenty-four thousand, two hundred forty-four".