1222005 has 16 divisors (see below), whose sum is σ = 2003904. Its totient is φ = 635520.

The previous prime is 1222003. The next prime is 1222019. The reversal of 1222005 is 5002221.

It is not a de Polignac number, because 1222005 - 2¹ = 1222003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222003) by changing a digit.

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, 379 + ... + 1608.

It is an arithmetic number, because the mean of its divisors is an integer number (125244).

2^1222005 is an apocalyptic number.

1222005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1222005 is a deficient number, since it is larger than the sum of its proper divisors (781899).

1222005 is a wasteful number, since it uses less digits than its factorization.

1222005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 1222005 is about 1105.4433499732. The cubic root of 1222005 is about 106.9114765543.

Adding to 1222005 its reverse (5002221), we get a palindrome (6224226).

The spelling of 1222005 in words is "one million, two hundred twenty-two thousand, five".