4220965 has 16 divisors (see below), whose sum is σ = 5862528. Its totient is φ = 2857536.

The previous prime is 4220963. The next prime is 4220969. The reversal of 4220965 is 5690224.

4220965 is a nontrivial binomial coefficient, being equal to C(2906, 2).

It is a cyclic number.

It is not a de Polignac number, because 4220965 - 2¹ = 4220963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2179 + ... + 3631.

It is an arithmetic number, because the mean of its divisors is an integer number (366408).

Almost surely, 2^4220965 is an apocalyptic number.

4220965 is the 2905-th triangular number and also the 1453-rd hexagonal number.

4220965 is the 969-th centered nonagonal number.

It is an amenable number.

4220965 is a deficient number, since it is larger than the sum of its proper divisors (1641563).

4220965 is a wasteful number, since it uses less digits than its factorization.

4220965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 4220965 is about 2054.4987223165. The cubic root of 4220965 is about 161.6108757548.

The spelling of 4220965 in words is "four million, two hundred twenty thousand, nine hundred sixty-five".