421140521515252 has 72 divisors (see below), whose sum is σ = 925836218003648. Its totient is φ = 164076616154880.

The previous prime is 421140521515249. The next prime is 421140521515291. The reversal of 421140521515252 is 252515125041124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135621148 + ... + 138691660.

Almost surely, 2^{421140521515252} is an apocalyptic number.

It is an amenable number.

421140521515252 is an abundant number, since it is smaller than the sum of its proper divisors (504695696488396).

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

421140521515252 is a wasteful number, since it uses less digits than its factorization.

421140521515252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3111029 (or 3111016 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 40.

Adding to 421140521515252 its reverse (252515125041124), we get a palindrome (673655646556376).

The spelling of 421140521515252 in words is "four hundred twenty-one trillion, one hundred forty billion, five hundred twenty-one million, five hundred fifteen thousand, two hundred fifty-two".