1284559222 has 4 divisors (see below), whose sum is σ = 1926838836. Its totient is φ = 642279610.

The previous prime is 1284559207. The next prime is 1284559249. The reversal of 1284559222 is 2229554821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2229554821 = 13 ⋅171504217.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321139804 + ... + 321139807.

It is an arithmetic number, because the mean of its divisors is an integer number (481709709).

Almost surely, 2^1284559222 is an apocalyptic number.

1284559222 is a deficient number, since it is larger than the sum of its proper divisors (642279614).

1284559222 is an equidigital number, since it uses as much as digits as its factorization.

1284559222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642279613.

The product of its digits is 115200, while the sum is 40.

The square root of 1284559222 is about 35840.7480669698. The cubic root of 1284559222 is about 1087.0546474677.

The spelling of 1284559222 in words is "one billion, two hundred eighty-four million, five hundred fifty-nine thousand, two hundred twenty-two".