4221457 has 8 divisors (see below), whose sum is σ = 4492800. Its totient is φ = 3952704.

The previous prime is 4221449. The next prime is 4221467. The reversal of 4221457 is 7541224.

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

It is not a de Polignac number, because 4221457 - 2³ = 4221449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4221407) 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 7 ways as a sum of consecutive naturals, for example, 3544 + ... + 4582.

It is an arithmetic number, because the mean of its divisors is an integer number (561600).

Almost surely, 2^4221457 is an apocalyptic number.

It is an amenable number.

4221457 is a deficient number, since it is larger than the sum of its proper divisors (271343).

4221457 is a wasteful number, since it uses less digits than its factorization.

4221457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295.

The product of its digits is 2240, while the sum is 25.

The square root of 4221457 is about 2054.6184560643. The cubic root of 4221457 is about 161.6171546872.

The spelling of 4221457 in words is "four million, two hundred twenty-one thousand, four hundred fifty-seven".