1155420443 has 2 divisors, whose sum is σ = 1155420444. Its totient is φ = 1155420442.

The previous prime is 1155420439. The next prime is 1155420493. The reversal of 1155420443 is 3440245511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1155420443 - 2² = 1155420439 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155420493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577710221 + 577710222.

It is an arithmetic number, because the mean of its divisors is an integer number (577710222).

Almost surely, 2^1155420443 is an apocalyptic number.

1155420443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155420443 is an equidigital number, since it uses as much as digits as its factorization.

1155420443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 1155420443 is about 33991.4760344413. The cubic root of 1155420443 is about 1049.3330437128. Note that the first 3 decimals are identical.

Adding to 1155420443 its reverse (3440245511), we get a palindrome (4595665954).

The spelling of 1155420443 in words is "one billion, one hundred fifty-five million, four hundred twenty thousand, four hundred forty-three".