4851221 has 4 divisors (see below), whose sum is σ = 5007744. Its totient is φ = 4694700.

The previous prime is 4851211. The next prime is 4851227. The reversal of 4851221 is 1221584.

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 4851221 - 2²² = 656917 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 (4851227) 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, 78215 + ... + 78276.

It is an arithmetic number, because the mean of its divisors is an integer number (1251936).

Almost surely, 2^4851221 is an apocalyptic number.

It is an amenable number.

4851221 is a deficient number, since it is larger than the sum of its proper divisors (156523).

4851221 is a wasteful number, since it uses less digits than its factorization.

4851221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156522.

The product of its digits is 640, while the sum is 23.

The square root of 4851221 is about 2202.5487508793. The cubic root of 4851221 is about 169.2844316841.

The spelling of 4851221 in words is "four million, eight hundred fifty-one thousand, two hundred twenty-one".