It is a congruent number.
It is an unprimeable number.
21422656 is an apocalyptic number.
1422656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
It is an amenable number.
1422656 is an equidigital number, since it uses as much as digits as its factorization.
1422656 is an odious number, because the sum of its binary digits is odd.
The square root of 1422656 is about 1192.7514409968. The cubic root of 1422656 is about 112.4691207431.
Adding to 1422656 its reverse (6562241), we get a palindrome (7984897).
The spelling of 1422656 in words is "one million, four hundred twenty-two thousand, six hundred fifty-six".