1121554429 has 2 divisors, whose sum is σ = 1121554430. Its totient is φ = 1121554428.

The previous prime is 1121554387. The next prime is 1121554529. The reversal of 1121554429 is 9244551211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 676260025 + 445294404 = 26005^2 + 21102^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121554429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121554394 and 1121554403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121554229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560777214 + 560777215.

It is an arithmetic number, because the mean of its divisors is an integer number (560777215).

Almost surely, 2^1121554429 is an apocalyptic number.

It is an amenable number.

1121554429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121554429 is an equidigital number, since it uses as much as digits as its factorization.

1121554429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 34.

The square root of 1121554429 is about 33489.6167341461. The cubic root of 1121554429 is about 1038.9790365759.

The spelling of 1121554429 in words is "one billion, one hundred twenty-one million, five hundred fifty-four thousand, four hundred twenty-nine".