1220065 has 16 divisors (see below), whose sum is σ = 1825920. Its totient is φ = 760320.

The previous prime is 1220041. The next prime is 1220071. The reversal of 1220065 is 5600221.

It is a happy number.

It is not a de Polignac number, because 1220065 - 2¹¹ = 1218017 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1200 + ... + 1969.

It is an arithmetic number, because the mean of its divisors is an integer number (114120).

2^1220065 is an apocalyptic number.

It is an amenable number.

1220065 is a deficient number, since it is larger than the sum of its proper divisors (605855).

1220065 is a wasteful number, since it uses less digits than its factorization.

1220065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3192.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1220065 is about 1104.5655254443. The cubic root of 1220065 is about 106.8548706433.

Adding to 1220065 its reverse (5600221), we get a palindrome (6820286).

The spelling of 1220065 in words is "one million, two hundred twenty thousand, sixty-five".