420121450340 has 24 divisors (see below), whose sum is σ = 882667211832. Its totient is φ = 167970072320.

The previous prime is 420121450321. The next prime is 420121450367. The reversal of 420121450340 is 43054121024.

It can be written as a sum of positive squares in 4 ways, for example, as 94336208164 + 325785242176 = 307142^2 + 570776^2 .

It is a super-2 number, since 2×420121450340² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4862849 + ... + 4948488.

It is an arithmetic number, because the mean of its divisors is an integer number (36777800493).

Almost surely, 2^420121450340 is an apocalyptic number.

It is an amenable number.

420121450340 is an abundant number, since it is smaller than the sum of its proper divisors (462545761492).

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

420121450340 is a wasteful number, since it uses less digits than its factorization.

420121450340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9813487 (or 9813485 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 420121450340 its reverse (43054121024), we get a palindrome (463175571364).

The spelling of 420121450340 in words is "four hundred twenty billion, one hundred twenty-one million, four hundred fifty thousand, three hundred forty".