421503412240 has 40 divisors (see below), whose sum is σ = 980031024000. Its totient is φ = 168595241856.

The previous prime is 421503412177. The next prime is 421503412241. The reversal of 421503412240 is 42214305124.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 421503412199 and 421503412208.

It is not an unprimeable number, because it can be changed into a prime (421503412241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2588761 + ... + 2746759.

It is an arithmetic number, because the mean of its divisors is an integer number (24500775600).

Almost surely, 2^421503412240 is an apocalyptic number.

421503412240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421503412240 is an abundant number, since it is smaller than the sum of its proper divisors (558527611760).

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

421503412240 is a wasteful number, since it uses less digits than its factorization.

421503412240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191359 (or 191353 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 421503412240 its reverse (42214305124), we get a palindrome (463717717364).

The spelling of 421503412240 in words is "four hundred twenty-one billion, five hundred three million, four hundred twelve thousand, two hundred forty".