1222355042 has 4 divisors (see below), whose sum is σ = 1833532566. Its totient is φ = 611177520.

The previous prime is 1222355011. The next prime is 1222355081. The reversal of 1222355042 is 2405532221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2405532221 = 19 ⋅126606959.

It can be written as a sum of positive squares in only one way, i.e., 1222271521 + 83521 = 34961^2 + 289^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305588759 + ... + 305588762.

Almost surely, 2^1222355042 is an apocalyptic number.

1222355042 is a deficient number, since it is larger than the sum of its proper divisors (611177524).

1222355042 is an equidigital number, since it uses as much as digits as its factorization.

1222355042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611177523.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1222355042 is about 34962.1944677390. The cubic root of 1222355042 is about 1069.2168380500.

Adding to 1222355042 its reverse (2405532221), we get a palindrome (3627887263).

The spelling of 1222355042 in words is "one billion, two hundred twenty-two million, three hundred fifty-five thousand, forty-two".