1154221433 has 4 divisors (see below), whose sum is σ = 1154649588. Its totient is φ = 1153793280.

The previous prime is 1154221429. The next prime is 1154221483. The reversal of 1154221433 is 3341224511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3341224511 = 83 ⋅40255717.

It can be written as a sum of positive squares in 2 ways, for example, as 911858809 + 242362624 = 30197^2 + 15568^2 .

It is a cyclic number.

It is not a de Polignac number, because 1154221433 - 2² = 1154221429 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1154221403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210008 + ... + 215433.

It is an arithmetic number, because the mean of its divisors is an integer number (288662397).

Almost surely, 2^1154221433 is an apocalyptic number.

It is an amenable number.

1154221433 is a deficient number, since it is larger than the sum of its proper divisors (428155).

1154221433 is an equidigital number, since it uses as much as digits as its factorization.

1154221433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428154.

The product of its digits is 2880, while the sum is 26.

The square root of 1154221433 is about 33973.8345348299. The cubic root of 1154221433 is about 1048.9699446406.

Adding to 1154221433 its reverse (3341224511), we get a palindrome (4495445944).

The spelling of 1154221433 in words is "one billion, one hundred fifty-four million, two hundred twenty-one thousand, four hundred thirty-three".