1171056217 has 8 divisors (see below), whose sum is σ = 1226876672. Its totient is φ = 1116363600.

The previous prime is 1171056209. The next prime is 1171056239. The reversal of 1171056217 is 7126501711.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1171056217 - 2³ = 1171056209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1171056287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279834 + ... + 283987.

It is an arithmetic number, because the mean of its divisors is an integer number (153359584).

Almost surely, 2^1171056217 is an apocalyptic number.

It is an amenable number.

1171056217 is a deficient number, since it is larger than the sum of its proper divisors (55820455).

1171056217 is an equidigital number, since it uses as much as digits as its factorization.

1171056217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563919.

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

The square root of 1171056217 is about 34220.6986632360. The cubic root of 1171056217 is about 1054.0452319019.

Adding to 1171056217 its reverse (7126501711), we get a palindrome (8297557928).

The spelling of 1171056217 in words is "one billion, one hundred seventy-one million, fifty-six thousand, two hundred seventeen".