1229216 has 24 divisors (see below), whose sum is σ = 2449440. Its totient is φ = 607168.

The previous prime is 1229213. The next prime is 1229227. The reversal of 1229216 is 6129221.

It is a junction number, because it is equal to n+sod(n) for n = 1229191 and 1229200.

It is not an unprimeable number, because it can be changed into a prime (1229213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3245 + ... + 3603.

It is an arithmetic number, because the mean of its divisors is an integer number (102060).

2^1229216 is an apocalyptic number.

1229216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1229216 is a deficient number, since it is larger than the sum of its proper divisors (1220224).

1229216 is a wasteful number, since it uses less digits than its factorization.

1229216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 468 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 1229216 is about 1108.7001398034. The cubic root of 1229216 is about 107.1213576332.

The spelling of 1229216 in words is "one million, two hundred twenty-nine thousand, two hundred sixteen".