1122398129 has 4 divisors (see below), whose sum is σ = 1122482676. Its totient is φ = 1122313584.

The previous prime is 1122398113. The next prime is 1122398143. The reversal of 1122398129 is 9218932211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 107848225 + 1014549904 = 10385^2 + 31852^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122398129 - 2⁴ = 1122398113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122398092 and 1122398101.

It is not an unprimeable number, because it can be changed into a prime (1122398159) 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 3 ways as a sum of consecutive naturals, for example, 17534 + ... + 50519.

It is an arithmetic number, because the mean of its divisors is an integer number (280620669).

Almost surely, 2^1122398129 is an apocalyptic number.

It is an amenable number.

1122398129 is a deficient number, since it is larger than the sum of its proper divisors (84547).

1122398129 is an equidigital number, since it uses as much as digits as its factorization.

1122398129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84546.

The product of its digits is 15552, while the sum is 38.

The square root of 1122398129 is about 33502.2108076467. The cubic root of 1122398129 is about 1039.2394985666.

The spelling of 1122398129 in words is "one billion, one hundred twenty-two million, three hundred ninety-eight thousand, one hundred twenty-nine".