421240452 has 12 divisors (see below), whose sum is σ = 982894416. Its totient is φ = 140413480.

The previous prime is 421240451. The next prime is 421240487. The reversal of 421240452 is 254042124.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (421240451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17551674 + ... + 17551697.

It is an arithmetic number, because the mean of its divisors is an integer number (81907868).

Almost surely, 2^421240452 is an apocalyptic number.

It is an amenable number.

421240452 is an abundant number, since it is smaller than the sum of its proper divisors (561653964).

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

421240452 is a wasteful number, since it uses less digits than its factorization.

421240452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35103378 (or 35103376 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 421240452 is about 20524.1431489843. The cubic root of 421240452 is about 749.6237828680.

Adding to 421240452 its reverse (254042124), we get a palindrome (675282576).

The spelling of 421240452 in words is "four hundred twenty-one million, two hundred forty thousand, four hundred fifty-two".