421625420 has 48 divisors (see below), whose sum is σ = 953745408. Its totient is φ = 156108480.

The previous prime is 421625419. The next prime is 421625437. The reversal of 421625420 is 24526124.

It is a self number, because there is not a number n which added to its sum of digits gives 421625420.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524 + ... + 29043.

It is an arithmetic number, because the mean of its divisors is an integer number (19869696).

Almost surely, 2^421625420 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 421625420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (476872704).

421625420 is an abundant number, since it is smaller than the sum of its proper divisors (532119988).

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

421625420 is a wasteful number, since it uses less digits than its factorization.

421625420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29630 (or 29628 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 421625420 is about 20533.5194255637. The cubic root of 421625420 is about 749.8520715656.

The spelling of 421625420 in words is "four hundred twenty-one million, six hundred twenty-five thousand, four hundred twenty".