421482521 has 4 divisors (see below), whose sum is σ = 439807872. Its totient is φ = 403157172.

The previous prime is 421482497. The next prime is 421482527. The reversal of 421482521 is 125284124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421482521 - 2¹⁰ = 421481497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421482527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9162641 + ... + 9162686.

It is an arithmetic number, because the mean of its divisors is an integer number (109951968).

Almost surely, 2^421482521 is an apocalyptic number.

It is an amenable number.

421482521 is a deficient number, since it is larger than the sum of its proper divisors (18325351).

421482521 is a wasteful number, since it uses less digits than its factorization.

421482521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18325350.

The product of its digits is 5120, while the sum is 29.

The square root of 421482521 is about 20530.0394787735. The cubic root of 421482521 is about 749.7673476899.

The spelling of 421482521 in words is "four hundred twenty-one million, four hundred eighty-two thousand, five hundred twenty-one".