1121398429 has 2 divisors, whose sum is σ = 1121398430. Its totient is φ = 1121398428.

The previous prime is 1121398417. The next prime is 1121398451. The reversal of 1121398429 is 9248931211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1120709529 + 688900 = 33477^2 + 830^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121398429 - 2²⁵ = 1087843997 is a prime.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 1121398391 and 1121398400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121398459) 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 as a sum of consecutive naturals, namely, 560699214 + 560699215.

It is an arithmetic number, because the mean of its divisors is an integer number (560699215).

Almost surely, 2^1121398429 is an apocalyptic number.

It is an amenable number.

1121398429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121398429 is an equidigital number, since it uses as much as digits as its factorization.

1121398429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 1121398429 is about 33487.2875730478. The cubic root of 1121398429 is about 1038.9308628862.

The spelling of 1121398429 in words is "one billion, one hundred twenty-one million, three hundred ninety-eight thousand, four hundred twenty-nine".