1222642369 has 4 divisors (see below), whose sum is σ = 1316691796. Its totient is φ = 1128592944.

The previous prime is 1222642361. The next prime is 1222642409. The reversal of 1222642369 is 9632462221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9632462221 = 22907 ⋅420503.

It can be written as a sum of positive squares in 2 ways, for example, as 454243969 + 768398400 = 21313^2 + 27720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222642369 - 2³ = 1222642361 is a prime.

It is a super-2 number, since 2×1222642369² = 2989708724947864322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222642361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47024694 + ... + 47024719.

It is an arithmetic number, because the mean of its divisors is an integer number (329172949).

Almost surely, 2^1222642369 is an apocalyptic number.

It is an amenable number.

1222642369 is a deficient number, since it is larger than the sum of its proper divisors (94049427).

1222642369 is an equidigital number, since it uses as much as digits as its factorization.

1222642369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94049426.

The product of its digits is 62208, while the sum is 37.

The square root of 1222642369 is about 34966.3033362121. The cubic root of 1222642369 is about 1069.3006082553.

The spelling of 1222642369 in words is "one billion, two hundred twenty-two million, six hundred forty-two thousand, three hundred sixty-nine".