1171217056 has 12 divisors (see below), whose sum is σ = 2305833642. Its totient is φ = 585608512.

The previous prime is 1171217053. The next prime is 1171217059. The reversal of 1171217056 is 6507121711.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1171217053) and next prime (1171217059).

It can be written as a sum of positive squares in only one way, i.e., 1168272400 + 2944656 = 34180^2 + 1716^2 .

It is not an unprimeable number, because it can be changed into a prime (1171217051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18300235 + ... + 18300298.

Almost surely, 2^1171217056 is an apocalyptic number.

1171217056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1171217056 is a deficient number, since it is larger than the sum of its proper divisors (1134616586).

1171217056 is an equidigital number, since it uses as much as digits as its factorization.

1171217056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36600543 (or 36600535 counting only the distinct ones).

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

The square root of 1171217056 is about 34223.0486076270. The cubic root of 1171217056 is about 1054.0934857255.

Adding to 1171217056 its reverse (6507121711), we get a palindrome (7678338767).

It can be divided in two parts, 117121705 and 6, that added together give a palindrome (117121711).

The spelling of 1171217056 in words is "one billion, one hundred seventy-one million, two hundred seventeen thousand, fifty-six".