1220426 has 16 divisors (see below), whose sum is σ = 1957824. Its totient is φ = 569184.

The previous prime is 1220423. The next prime is 1220437. The reversal of 1220426 is 6240221.

It is not an unprimeable number, because it can be changed into a prime (1220423) 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 7 ways as a sum of consecutive naturals, for example, 1670 + ... + 2286.

It is an arithmetic number, because the mean of its divisors is an integer number (122364).

2^1220426 is an apocalyptic number.

1220426 is a deficient number, since it is larger than the sum of its proper divisors (737398).

1220426 is a wasteful number, since it uses less digits than its factorization.

1220426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1220426 is about 1104.7289260267. The cubic root of 1220426 is about 106.8654085530.

Adding to 1220426 its reverse (6240221), we get a palindrome (7460647).

The spelling of 1220426 in words is "one million, two hundred twenty thousand, four hundred twenty-six".