4140221 has 4 divisors (see below), whose sum is σ = 4241244. Its totient is φ = 4039200.

The previous prime is 4140217. The next prime is 4140259. The reversal of 4140221 is 1220414.

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

It can be written as a sum of positive squares in 2 ways, for example, as 96100 + 4044121 = 310^2 + 2011^2 .

It is a cyclic number.

It is not a de Polignac number, because 4140221 - 2² = 4140217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4140196 and 4140205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4140211) 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, 50450 + ... + 50531.

It is an arithmetic number, because the mean of its divisors is an integer number (1060311).

Almost surely, 2^4140221 is an apocalyptic number.

4140221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4140221 is a deficient number, since it is larger than the sum of its proper divisors (101023).

4140221 is a wasteful number, since it uses less digits than its factorization.

4140221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101022.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 4140221 is about 2034.7533020000. The cubic root of 4140221 is about 160.5737344913.

Adding to 4140221 its reverse (1220414), we get a palindrome (5360635).

The spelling of 4140221 in words is "four million, one hundred forty thousand, two hundred twenty-one".