4221249 has 16 divisors (see below), whose sum is σ = 5990400. Its totient is φ = 2636496.

The previous prime is 4221247. The next prime is 4221263. The reversal of 4221249 is 9421224.

It is not a de Polignac number, because 4221249 - 2¹ = 4221247 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4221247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5512 + ... + 6230.

It is an arithmetic number, because the mean of its divisors is an integer number (374400).

Almost surely, 2^4221249 is an apocalyptic number.

It is an amenable number.

4221249 is a deficient number, since it is larger than the sum of its proper divisors (1769151).

4221249 is a wasteful number, since it uses less digits than its factorization.

4221249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844.

The product of its digits is 1152, while the sum is 24.

The square root of 4221249 is about 2054.5678377703. The cubic root of 4221249 is about 161.6145002387.

The spelling of 4221249 in words is "four million, two hundred twenty-one thousand, two hundred forty-nine".