1115604001 has 4 divisors (see below), whose sum is σ = 1119574404. Its totient is φ = 1111633600.

The previous prime is 1115603999. The next prime is 1115604011. The reversal of 1115604001 is 1004065111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1004065111 = 7 ⋅143437873.

It can be written as a sum of positive squares in 2 ways, for example, as 628254225 + 487349776 = 25065^2 + 22076^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115604001 - 2¹ = 1115603999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1115604001.

It is not an unprimeable number, because it can be changed into a prime (1115604011) 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, 1984780 + ... + 1985341.

It is an arithmetic number, because the mean of its divisors is an integer number (279893601).

Almost surely, 2^1115604001 is an apocalyptic number.

It is an amenable number.

1115604001 is a deficient number, since it is larger than the sum of its proper divisors (3970403).

1115604001 is an equidigital number, since it uses as much as digits as its factorization.

1115604001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3970402.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1115604001 is about 33400.6586911097. The cubic root of 1115604001 is about 1037.1383365345.

Adding to 1115604001 its reverse (1004065111), we get a palindrome (2119669112).

The spelling of 1115604001 in words is "one billion, one hundred fifteen million, six hundred four thousand, one".