425144420 has 48 divisors (see below), whose sum is σ = 939980160. Its totient is φ = 161204736.

The previous prime is 425144407. The next prime is 425144477. The reversal of 425144420 is 24441524.

It is a self number, because there is not a number n which added to its sum of digits gives 425144420.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47891 + ... + 56069.

It is an arithmetic number, because the mean of its divisors is an integer number (19582920).

Almost surely, 2^425144420 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 425144420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (469990080).

425144420 is an abundant number, since it is smaller than the sum of its proper divisors (514835740).

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

425144420 is a wasteful number, since it uses less digits than its factorization.

425144420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8324 (or 8322 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 425144420 is about 20619.0305300710. The cubic root of 425144420 is about 751.9324506437.

Adding to 425144420 its reverse (24441524), we get a palindrome (449585944).

The spelling of 425144420 in words is "four hundred twenty-five million, one hundred forty-four thousand, four hundred twenty".