4221131 has 4 divisors (see below), whose sum is σ = 4272072. Its totient is φ = 4170192.

The previous prime is 4221109. The next prime is 4221169. The reversal of 4221131 is 1311224.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4221131 is a prime.

It is a super-2 number, since 2×4221131² = 35635893838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4221031) 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, 25346 + ... + 25511.

It is an arithmetic number, because the mean of its divisors is an integer number (1068018).

Almost surely, 2^4221131 is an apocalyptic number.

4221131 is a deficient number, since it is larger than the sum of its proper divisors (50941).

4221131 is an equidigital number, since it uses as much as digits as its factorization.

4221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50940.

The product of its digits is 48, while the sum is 14.

The square root of 4221131 is about 2054.5391210683. The cubic root of 4221131 is about 161.6129943109.

Adding to 4221131 its reverse (1311224), we get a palindrome (5532355).

The spelling of 4221131 in words is "four million, two hundred twenty-one thousand, one hundred thirty-one".