421165980 has 120 divisors (see below), whose sum is σ = 1326402000. Its totient is φ = 111870720.

The previous prime is 421165963. The next prime is 421166003. The reversal of 421165980 is 89561124.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 808120 + ... + 808640.

It is an arithmetic number, because the mean of its divisors is an integer number (11053350).

Almost surely, 2^421165980 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 421165980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (663201000).

421165980 is an abundant number, since it is smaller than the sum of its proper divisors (905236020).

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

421165980 is a wasteful number, since it uses less digits than its factorization.

421165980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041 (or 1030 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 421165980 is about 20522.3288152198. The cubic root of 421165980 is about 749.5796044007.

The spelling of 421165980 in words is "four hundred twenty-one million, one hundred sixty-five thousand, nine hundred eighty".