421360652521 has 8 divisors (see below), whose sum is σ = 427660606080. Its totient is φ = 415061022288.

The previous prime is 421360652519. The next prime is 421360652543. The reversal of 421360652521 is 125256063124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421360652521 - 2¹ = 421360652519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421360652501) by changing a digit.

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, 4328775 + ... + 4425043.

It is an arithmetic number, because the mean of its divisors is an integer number (53457575760).

Almost surely, 2^421360652521 is an apocalyptic number.

It is an amenable number.

421360652521 is a deficient number, since it is larger than the sum of its proper divisors (6299953559).

421360652521 is an equidigital number, since it uses as much as digits as its factorization.

421360652521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161663.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 421360652521 in words is "four hundred twenty-one billion, three hundred sixty million, six hundred fifty-two thousand, five hundred twenty-one".