4221487 has 4 divisors (see below), whose sum is σ = 4357696. Its totient is φ = 4085280.

The previous prime is 4221479. The next prime is 4221499. The reversal of 4221487 is 7841224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4221487 - 2³ = 4221479 is a prime.

It is a Duffinian number.

4221487 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68058 + ... + 68119.

It is an arithmetic number, because the mean of its divisors is an integer number (1089424).

Almost surely, 2^4221487 is an apocalyptic number.

4221487 is a deficient number, since it is larger than the sum of its proper divisors (136209).

4221487 is a wasteful number, since it uses less digits than its factorization.

4221487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136208.

The product of its digits is 3584, while the sum is 28.

The square root of 4221487 is about 2054.6257566769. The cubic root of 4221487 is about 161.6175375332.

The spelling of 4221487 in words is "four million, two hundred twenty-one thousand, four hundred eighty-seven".