1171217755 has 16 divisors (see below), whose sum is σ = 1418376960. Its totient is φ = 928399968.

The previous prime is 1171217713. The next prime is 1171217783. The reversal of 1171217755 is 5577121711.

It is a cyclic number.

It is not a de Polignac number, because 1171217755 - 2¹⁹ = 1170693467 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290584 + ... + 294586.

It is an arithmetic number, because the mean of its divisors is an integer number (88648560).

Almost surely, 2^1171217755 is an apocalyptic number.

1171217755 is a deficient number, since it is larger than the sum of its proper divisors (247159205).

1171217755 is a wasteful number, since it uses less digits than its factorization.

1171217755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4530.

The product of its digits is 17150, while the sum is 37.

The square root of 1171217755 is about 34223.0588200412. The cubic root of 1171217755 is about 1054.0936954251.

The spelling of 1171217755 in words is "one billion, one hundred seventy-one million, two hundred seventeen thousand, seven hundred fifty-five".