421523405101452 has 24 divisors (see below), whose sum is σ = 983561267840256. Its totient is φ = 140506850852368.

The previous prime is 421523405101417. The next prime is 421523405101457. The reversal of 421523405101452 is 254101504325124.

It is a self number, because there is not a number n which added to its sum of digits gives 421523405101452.

It is not an unprimeable number, because it can be changed into a prime (421523405101457) 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, 117007728 + ... + 120556439.

It is an arithmetic number, because the mean of its divisors is an integer number (40981719493344).

Almost surely, 2^{421523405101452} is an apocalyptic number.

It is an amenable number.

421523405101452 is an abundant number, since it is smaller than the sum of its proper divisors (562037862738804).

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

421523405101452 is a wasteful number, since it uses less digits than its factorization.

421523405101452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237712037 (or 237712035 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 39.

Adding to 421523405101452 its reverse (254101504325124), we get a palindrome (675624909426576).

The spelling of 421523405101452 in words is "four hundred twenty-one trillion, five hundred twenty-three billion, four hundred five million, one hundred one thousand, four hundred fifty-two".