1155421153 has 2 divisors, whose sum is σ = 1155421154. Its totient is φ = 1155421152.

The previous prime is 1155421093. The next prime is 1155421187. The reversal of 1155421153 is 3511245511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 893531664 + 261889489 = 29892^2 + 16183^2 .

It is an emirp because it is prime and its reverse (3511245511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1155421153 - 2²⁵ = 1121866721 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155421453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577710576 + 577710577.

It is an arithmetic number, because the mean of its divisors is an integer number (577710577).

Almost surely, 2^1155421153 is an apocalyptic number.

It is an amenable number.

1155421153 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155421153 is an equidigital number, since it uses as much as digits as its factorization.

1155421153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000, while the sum is 28.

The square root of 1155421153 is about 33991.4864782345. The cubic root of 1155421153 is about 1049.3332586493. Note that the first 3 decimals are identical.

Adding to 1155421153 its reverse (3511245511), we get a palindrome (4666666664).

The spelling of 1155421153 in words is "one billion, one hundred fifty-five million, four hundred twenty-one thousand, one hundred fifty-three".