1225222 has 4 divisors (see below), whose sum is σ = 1837836. Its totient is φ = 612610.

The previous prime is 1225219. The next prime is 1225223. The reversal of 1225222 is 2225221.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1225196 and 1225205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306304 + ... + 306307.

It is an arithmetic number, because the mean of its divisors is an integer number (459459).

2^1225222 is an apocalyptic number.

1225222 is a deficient number, since it is larger than the sum of its proper divisors (612614).

1225222 is an equidigital number, since it uses as much as digits as its factorization.

1225222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612613.

The product of its digits is 160, while the sum is 16.

The square root of 1225222 is about 1106.8974658928. The cubic root of 1225222 is about 107.0052112639.

Subtracting 1225222 from its reverse (2225221), we obtain a palindrome (999999).

The spelling of 1225222 in words is "one million, two hundred twenty-five thousand, two hundred twenty-two".