1228722 has 16 divisors (see below), whose sum is σ = 2680992. Its totient is φ = 372320.

The previous prime is 1228693. The next prime is 1228741. The reversal of 1228722 is 2278221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1228692 and 1228701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9243 + ... + 9374.

It is an arithmetic number, because the mean of its divisors is an integer number (167562).

2^1228722 is an apocalyptic number.

1228722 is an abundant number, since it is smaller than the sum of its proper divisors (1452270).

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

1228722 is a wasteful number, since it uses less digits than its factorization.

1228722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18633.

The product of its digits is 896, while the sum is 24.

The square root of 1228722 is about 1108.4773340037. The cubic root of 1228722 is about 107.1070056557.

The spelling of 1228722 in words is "one million, two hundred twenty-eight thousand, seven hundred twenty-two".