1222655 has 16 divisors (see below), whose sum is σ = 1694784. Its totient is φ = 829440.

The previous prime is 1222651. The next prime is 1222667. The reversal of 1222655 is 5562221.

It is not a de Polignac number, because 1222655 - 2² = 1222651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6239 + ... + 6431.

It is an arithmetic number, because the mean of its divisors is an integer number (105924).

2^1222655 is an apocalyptic number.

1222655 is a deficient number, since it is larger than the sum of its proper divisors (472129).

1222655 is a wasteful number, since it uses less digits than its factorization.

1222655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386.

The product of its digits is 1200, while the sum is 23.

The square root of 1222655 is about 1105.7373105761. The cubic root of 1222655 is about 106.9304290523.

Adding to 1222655 its reverse (5562221), we get a palindrome (6784876).

The spelling of 1222655 in words is "one million, two hundred twenty-two thousand, six hundred fifty-five".