1115540401 has 2 divisors, whose sum is σ = 1115540402. Its totient is φ = 1115540400.

The previous prime is 1115540381. The next prime is 1115540429. The reversal of 1115540401 is 1040455111.

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., 877640625 + 237899776 = 29625^2 + 15424^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115540401 - 2¹¹ = 1115538353 is a prime.

It is not a weakly prime, because it can be changed into another prime (1115540471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557770200 + 557770201.

It is an arithmetic number, because the mean of its divisors is an integer number (557770201).

Almost surely, 2^1115540401 is an apocalyptic number.

It is an amenable number.

1115540401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115540401 is an equidigital number, since it uses as much as digits as its factorization.

1115540401 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 1115540401 is about 33399.7066005077. The cubic root of 1115540401 is about 1037.1186272554.

Adding to 1115540401 its reverse (1040455111), we get a palindrome (2155995512).

The spelling of 1115540401 in words is "one billion, one hundred fifteen million, five hundred forty thousand, four hundred one".