1284940222 has 4 divisors (see below), whose sum is σ = 1927410336. Its totient is φ = 642470110.

The previous prime is 1284940219. The next prime is 1284940231. The reversal of 1284940222 is 2220494821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2220494821 = 179 ⋅12404999.

It is a super-2 number, since 2×1284940222² = 3302142748226818568, which contains 22 as substring.

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, 321235054 + ... + 321235057.

It is an arithmetic number, because the mean of its divisors is an integer number (481852584).

Almost surely, 2^1284940222 is an apocalyptic number.

1284940222 is a deficient number, since it is larger than the sum of its proper divisors (642470114).

1284940222 is an equidigital number, since it uses as much as digits as its factorization.

1284940222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642470113.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 1284940222 is about 35846.0628521460. The cubic root of 1284940222 is about 1087.1621102386.

The spelling of 1284940222 in words is "one billion, two hundred eighty-four million, nine hundred forty thousand, two hundred twenty-two".