1135221929 has 4 divisors (see below), whose sum is σ = 1140179460. Its totient is φ = 1130264400.

The previous prime is 1135221917. The next prime is 1135221931. The reversal of 1135221929 is 9291225311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9291225311 = 13219 ⋅702869.

It can be written as a sum of positive squares in 2 ways, for example, as 1074069529 + 61152400 = 32773^2 + 7820^2 .

It is a cyclic number.

It is not a de Polignac number, because 1135221929 - 2⁸ = 1135221673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1135221229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2478422 + ... + 2478879.

It is an arithmetic number, because the mean of its divisors is an integer number (285044865).

Almost surely, 2^1135221929 is an apocalyptic number.

It is an amenable number.

1135221929 is a deficient number, since it is larger than the sum of its proper divisors (4957531).

1135221929 is an equidigital number, since it uses as much as digits as its factorization.

1135221929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4957530.

The product of its digits is 9720, while the sum is 35.

The square root of 1135221929 is about 33693.0546107058. The cubic root of 1135221929 is about 1043.1824143720.

The spelling of 1135221929 in words is "one billion, one hundred thirty-five million, two hundred twenty-one thousand, nine hundred twenty-nine".