421234240 has 112 divisors (see below), whose sum is σ = 1154045952. Its totient is φ = 143456256.

The previous prime is 421234207. The next prime is 421234243. The reversal of 421234240 is 42432124.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (421234243) 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, 386977 + ... + 388063.

Almost surely, 2^421234240 is an apocalyptic number.

421234240 is a gapful number since it is divisible by the number (40) 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 421234240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (577022976).

421234240 is an abundant number, since it is smaller than the sum of its proper divisors (732811712).

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

421234240 is a wasteful number, since it uses less digits than its factorization.

421234240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284 (or 1274 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 421234240 is about 20523.9918144595. The cubic root of 421234240 is about 749.6200979688.

Adding to 421234240 its reverse (42432124), we get a palindrome (463666364).

The spelling of 421234240 in words is "four hundred twenty-one million, two hundred thirty-four thousand, two hundred forty".