1116551257 has 4 divisors (see below), whose sum is σ = 1146728356. Its totient is φ = 1086374160.

The previous prime is 1116551251. The next prime is 1116551297. The reversal of 1116551257 is 7521556111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7521556111 = 2801 ⋅2685311.

It can be written as a sum of positive squares in 2 ways, for example, as 523677456 + 592873801 = 22884^2 + 24349^2 .

It is a cyclic number.

It is not a de Polignac number, because 1116551257 - 2¹¹ = 1116549209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1116551251) 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, 15088494 + ... + 15088567.

It is an arithmetic number, because the mean of its divisors is an integer number (286682089).

Almost surely, 2^1116551257 is an apocalyptic number.

It is an amenable number.

1116551257 is a deficient number, since it is larger than the sum of its proper divisors (30177099).

1116551257 is an equidigital number, since it uses as much as digits as its factorization.

1116551257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30177098.

The product of its digits is 10500, while the sum is 34.

The square root of 1116551257 is about 33414.8358816858. The cubic root of 1116551257 is about 1037.4317971714.

The spelling of 1116551257 in words is "one billion, one hundred sixteen million, five hundred fifty-one thousand, two hundred fifty-seven".