1115571449 has 4 divisors (see below), whose sum is σ = 1154039460. Its totient is φ = 1077103440.

The previous prime is 1115571389. The next prime is 1115571451. The reversal of 1115571449 is 9441755111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9441755111 = 1091 ⋅8654221.

It can be written as a sum of positive squares in 2 ways, for example, as 588547600 + 527023849 = 24260^2 + 22957^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1115571449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115573449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19233962 + ... + 19234019.

It is an arithmetic number, because the mean of its divisors is an integer number (288509865).

Almost surely, 2^1115571449 is an apocalyptic number.

It is an amenable number.

1115571449 is a deficient number, since it is larger than the sum of its proper divisors (38468011).

1115571449 is an equidigital number, since it uses as much as digits as its factorization.

1115571449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38468010.

The product of its digits is 25200, while the sum is 38.

The square root of 1115571449 is about 33400.1713917758. The cubic root of 1115571449 is about 1037.1282489480.

The spelling of 1115571449 in words is "one billion, one hundred fifteen million, five hundred seventy-one thousand, four hundred forty-nine".