421042380 has 96 divisors (see below), whose sum is σ = 1290401280. Its totient is φ = 101729280.

The previous prime is 421042379. The next prime is 421042399. The reversal of 421042380 is 83240124.

It is a self number, because there is not a number n which added to its sum of digits gives 421042380.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236052 + ... + 237828.

It is an arithmetic number, because the mean of its divisors is an integer number (13441680).

Almost surely, 2^421042380 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 421042380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (645200640).

421042380 is an abundant number, since it is smaller than the sum of its proper divisors (869358900).

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

421042380 is a wasteful number, since it uses less digits than its factorization.

421042380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159 (or 2157 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 421042380 is about 20519.3172401033. The cubic root of 421042380 is about 749.5062706019.

The spelling of 421042380 in words is "four hundred twenty-one million, forty-two thousand, three hundred eighty".