1116720571 has 4 divisors (see below), whose sum is σ = 1116880192. Its totient is φ = 1116560952.

The previous prime is 1116720529. The next prime is 1116720593. The reversal of 1116720571 is 1750276111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1116720571 - 2¹³ = 1116712379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1116720511) 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, 68811 + ... + 83476.

It is an arithmetic number, because the mean of its divisors is an integer number (279220048).

Almost surely, 2^1116720571 is an apocalyptic number.

1116720571 is a deficient number, since it is larger than the sum of its proper divisors (159621).

1116720571 is an equidigital number, since it uses as much as digits as its factorization.

1116720571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159620.

The product of its (nonzero) digits is 2940, while the sum is 31.

The square root of 1116720571 is about 33417.3693010087. The cubic root of 1116720571 is about 1037.4842332921.

Adding to 1116720571 its reverse (1750276111), we get a palindrome (2866996682).

The spelling of 1116720571 in words is "one billion, one hundred sixteen million, seven hundred twenty thousand, five hundred seventy-one".