421120540 has 12 divisors (see below), whose sum is σ = 884353176. Its totient is φ = 168448208.

The previous prime is 421120489. The next prime is 421120589. The reversal of 421120540 is 45021124.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 10527994 + ... + 10528033.

It is an arithmetic number, because the mean of its divisors is an integer number (73696098).

Almost surely, 2^421120540 is an apocalyptic number.

It is an amenable number.

421120540 is an abundant number, since it is smaller than the sum of its proper divisors (463232636).

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

421120540 is a wasteful number, since it uses less digits than its factorization.

421120540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21056036 (or 21056034 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 421120540 is about 20521.2216985247. The cubic root of 421120540 is about 749.5526458113.

Adding to 421120540 its reverse (45021124), we get a palindrome (466141664).

The spelling of 421120540 in words is "four hundred twenty-one million, one hundred twenty thousand, five hundred forty".