427587221 has 4 divisors (see below), whose sum is σ = 427747200. Its totient is φ = 427427244.

The previous prime is 427587217. The next prime is 427587253. The reversal of 427587221 is 122785724.

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 427587221 - 2² = 427587217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427587521) 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 3 ways as a sum of consecutive naturals, for example, 75911 + ... + 81348.

It is an arithmetic number, because the mean of its divisors is an integer number (106936800).

Almost surely, 2^427587221 is an apocalyptic number.

It is an amenable number.

427587221 is a deficient number, since it is larger than the sum of its proper divisors (159979).

427587221 is a wasteful number, since it uses less digits than its factorization.

427587221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159978.

The product of its digits is 62720, while the sum is 38.

The square root of 427587221 is about 20678.1822460293. The cubic root of 427587221 is about 753.3698559359.

The spelling of 427587221 in words is "four hundred twenty-seven million, five hundred eighty-seven thousand, two hundred twenty-one".