4221261 has 32 divisors (see below), whose sum is σ = 6963840. Its totient is φ = 2505600.

The previous prime is 4221247. The next prime is 4221263. The reversal of 4221261 is 1621224.

4221261 = 74² + 75² + ... + 235².

It is not a de Polignac number, because 4221261 - 2⁵ = 4221229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18001 + ... + 18233.

It is an arithmetic number, because the mean of its divisors is an integer number (217620).

Almost surely, 2^4221261 is an apocalyptic number.

It is an amenable number.

4221261 is a deficient number, since it is larger than the sum of its proper divisors (2742579).

4221261 is a wasteful number, since it uses less digits than its factorization.

4221261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 308 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 4221261 is about 2054.5707580904. The cubic root of 4221261 is about 161.6146533824.

Adding to 4221261 its reverse (1621224), we get a palindrome (5842485).

The spelling of 4221261 in words is "four million, two hundred twenty-one thousand, two hundred sixty-one".