4221251 has 4 divisors (see below), whose sum is σ = 4235952. Its totient is φ = 4206552.

The previous prime is 4221247. The next prime is 4221263. The reversal of 4221251 is 1521224.

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 4221251 - 2² = 4221247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4221271) 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, 6911 + ... + 7496.

It is an arithmetic number, because the mean of its divisors is an integer number (1058988).

Almost surely, 2^4221251 is an apocalyptic number.

4221251 is a deficient number, since it is larger than the sum of its proper divisors (14701).

4221251 is a wasteful number, since it uses less digits than its factorization.

4221251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14700.

The product of its digits is 160, while the sum is 17.

The square root of 4221251 is about 2054.5683244906. The cubic root of 4221251 is about 161.6145257627.

Adding to 4221251 its reverse (1521224), we get a palindrome (5742475).

The spelling of 4221251 in words is "four million, two hundred twenty-one thousand, two hundred fifty-one".