1121758429 has 4 divisors (see below), whose sum is σ = 1223736480. Its totient is φ = 1019780380.

The previous prime is 1121758427. The next prime is 1121758441. The reversal of 1121758429 is 9248571211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9248571211 = 11 ⋅840779201.

It is a cyclic number.

It is not a de Polignac number, because 1121758429 - 2¹ = 1121758427 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121758391 and 1121758400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121758427) 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, 50989009 + ... + 50989030.

It is an arithmetic number, because the mean of its divisors is an integer number (305934120).

Almost surely, 2^1121758429 is an apocalyptic number.

It is an amenable number.

1121758429 is a deficient number, since it is larger than the sum of its proper divisors (101978051).

1121758429 is a wasteful number, since it uses less digits than its factorization.

1121758429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101978050.

The product of its digits is 40320, while the sum is 40.

The square root of 1121758429 is about 33492.6623157969. The cubic root of 1121758429 is about 1039.0420261995.

The spelling of 1121758429 in words is "one billion, one hundred twenty-one million, seven hundred fifty-eight thousand, four hundred twenty-nine".