4220261 has 8 divisors (see below), whose sum is σ = 4461600. Its totient is φ = 3980880.

The previous prime is 4220243. The next prime is 4220269. The reversal of 4220261 is 1620224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-4220261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7106 + ... + 7676.

It is an arithmetic number, because the mean of its divisors is an integer number (557700).

Almost surely, 2^4220261 is an apocalyptic number.

It is an amenable number.

4220261 is a deficient number, since it is larger than the sum of its proper divisors (241339).

4220261 is a wasteful number, since it uses less digits than its factorization.

4220261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 4220261 is about 2054.3273838412. The cubic root of 4220261 is about 161.6018904175.

Adding to 4220261 its reverse (1620224), we get a palindrome (5840485).

The spelling of 4220261 in words is "four million, two hundred twenty thousand, two hundred sixty-one".