1222175387 has 2 divisors, whose sum is σ = 1222175388. Its totient is φ = 1222175386.

The previous prime is 1222175377. The next prime is 1222175411. The reversal of 1222175387 is 7835712221.

It is a weak prime.

It is an emirp because it is prime and its reverse (7835712221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222175387 - 2⁸ = 1222175131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222175387.

It is not a weakly prime, because it can be changed into another prime (1222175377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611087693 + 611087694.

It is an arithmetic number, because the mean of its divisors is an integer number (611087694).

Almost surely, 2^1222175387 is an apocalyptic number.

1222175387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222175387 is an equidigital number, since it uses as much as digits as its factorization.

1222175387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 38.

The square root of 1222175387 is about 34959.6250981042. The cubic root of 1222175387 is about 1069.1644529530.

The spelling of 1222175387 in words is "one billion, two hundred twenty-two million, one hundred seventy-five thousand, three hundred eighty-seven".