4148221 has 16 divisors (see below), whose sum is σ = 5477760. Its totient is φ = 3041280.

The previous prime is 4148219. The next prime is 4148227. The reversal of 4148221 is 1228414.

It is not a de Polignac number, because 4148221 - 2¹ = 4148219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4148192 and 4148201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4148227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276 + ... + 2893.

It is an arithmetic number, because the mean of its divisors is an integer number (342360).

Almost surely, 2^4148221 is an apocalyptic number.

It is an amenable number.

4148221 is a deficient number, since it is larger than the sum of its proper divisors (1329539).

4148221 is a wasteful number, since it uses less digits than its factorization.

4148221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3204.

The product of its digits is 512, while the sum is 22.

The square root of 4148221 is about 2036.7181935653. The cubic root of 4148221 is about 160.6770915645.

It can be divided in two parts, 4 and 148221, that added together give a square (148225 = 385²).

The spelling of 4148221 in words is "four million, one hundred forty-eight thousand, two hundred twenty-one".