1228122867 has 6 divisors (see below), whose sum is σ = 1637578092. Its totient is φ = 818708112.

The previous prime is 1228122851. The next prime is 1228122887. The reversal of 1228122867 is 7682218221.

It is not a de Polignac number, because 1228122867 - 2⁴ = 1228122851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1228122887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50583 + ... + 70815.

It is an arithmetic number, because the mean of its divisors is an integer number (272929682).

Almost surely, 2^1228122867 is an apocalyptic number.

1228122867 is a deficient number, since it is larger than the sum of its proper divisors (409455225).

1228122867 is an frugal number, since it uses more digits than its factorization.

1228122867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40469 (or 20236 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 1228122867 is about 35044.5839895411. The cubic root of 1228122867 is about 1070.8959412988.

The spelling of 1228122867 in words is "one billion, two hundred twenty-eight million, one hundred twenty-two thousand, eight hundred sixty-seven".