420841560 has 64 divisors (see below), whose sum is σ = 1271052000. Its totient is φ = 111466496.

The previous prime is 420841517. The next prime is 420841601. The reversal of 420841560 is 65148024.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6112 + ... + 29648.

Almost surely, 2^420841560 is an apocalyptic number.

420841560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420841560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635526000).

420841560 is an abundant number, since it is smaller than the sum of its proper divisors (850210440).

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

420841560 is a wasteful number, since it uses less digits than its factorization.

420841560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23700 (or 23696 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 420841560 is about 20514.4232187990. The cubic root of 420841560 is about 749.3870903699.

Adding to 420841560 its reverse (65148024), we get a palindrome (485989584).

The spelling of 420841560 in words is "four hundred twenty million, eight hundred forty-one thousand, five hundred sixty".