1155404101 has 2 divisors, whose sum is σ = 1155404102. Its totient is φ = 1155404100.

The previous prime is 1155404093. The next prime is 1155404113. The reversal of 1155404101 is 1014045511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 786802500 + 368601601 = 28050^2 + 19199^2 .

It is an emirp because it is prime and its reverse (1014045511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1155404101 - 2³ = 1155404093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155404191) 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 as a sum of consecutive naturals, namely, 577702050 + 577702051.

It is an arithmetic number, because the mean of its divisors is an integer number (577702051).

Almost surely, 2^1155404101 is an apocalyptic number.

It is an amenable number.

1155404101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155404101 is an equidigital number, since it uses as much as digits as its factorization.

1155404101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1155404101 is about 33991.2356497966. The cubic root of 1155404101 is about 1049.3280965147.

Adding to 1155404101 its reverse (1014045511), we get a palindrome (2169449612).

The spelling of 1155404101 in words is "one billion, one hundred fifty-five million, four hundred four thousand, one hundred one".