1222506 has 16 divisors (see below), whose sum is σ = 2716800. Its totient is φ = 407484.

The previous prime is 1222499. The next prime is 1222513. The reversal of 1222506 is 6052221.

It is an interprime number because it is at equal distance from previous prime (1222499) and next prime (1222513).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 7 ways as a sum of consecutive naturals, for example, 11266 + ... + 11373.

It is an arithmetic number, because the mean of its divisors is an integer number (169800).

2^1222506 is an apocalyptic number.

1222506 is an abundant number, since it is smaller than the sum of its proper divisors (1494294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222506 is a wasteful number, since it uses less digits than its factorization.

1222506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22650 (or 22644 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1222506 is about 1105.6699326653. The cubic root of 1222506 is about 106.9260851501.

Subtracting from 1222506 its product of nonzero digits (240), we obtain a triangular number (1222266 = T₁₅₆₃).

Adding to 1222506 its reverse (6052221), we get a palindrome (7274727).

It can be divided in two parts, 1222 and 506, that added together give a cube (1728 = 12³).

The spelling of 1222506 in words is "one million, two hundred twenty-two thousand, five hundred six".