1222493138 has 4 divisors (see below), whose sum is σ = 1833739710. Its totient is φ = 611246568.

The previous prime is 1222493119. The next prime is 1222493143. The reversal of 1222493138 is 8313942221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8313942221 = 13 ⋅639534017.

It can be written as a sum of positive squares in only one way, i.e., 847799689 + 374693449 = 29117^2 + 19357^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1222493098 and 1222493107.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305623283 + ... + 305623286.

Almost surely, 2^1222493138 is an apocalyptic number.

1222493138 is a deficient number, since it is larger than the sum of its proper divisors (611246572).

1222493138 is an equidigital number, since it uses as much as digits as its factorization.

1222493138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611246571.

The product of its digits is 20736, while the sum is 35.

The square root of 1222493138 is about 34964.1693452025. The cubic root of 1222493138 is about 1069.2571015859.

The spelling of 1222493138 in words is "one billion, two hundred twenty-two million, four hundred ninety-three thousand, one hundred thirty-eight".