421453434234140 has 144 divisors (see below), whose sum is σ = 1114519484164800. Its totient is φ = 131040928465920.

The previous prime is 421453434234097. The next prime is 421453434234149. The reversal of 421453434234140 is 41432434354124.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 421453434234091 and 421453434234100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421453434234149) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23486195 + ... + 37343114.

Almost surely, 2^{421453434234140} is an apocalyptic number.

It is an amenable number.

421453434234140 is an abundant number, since it is smaller than the sum of its proper divisors (693066049930660).

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

421453434234140 is a wasteful number, since it uses less digits than its factorization.

421453434234140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60829756 (or 60829743 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 44.

Adding to 421453434234140 its reverse (41432434354124), we get a palindrome (462885868588264).

The spelling of 421453434234140 in words is "four hundred twenty-one trillion, four hundred fifty-three billion, four hundred thirty-four million, two hundred thirty-four thousand, one hundred forty".