1170255681 has 63 divisors (see below), whose sum is σ = 2052381843. Its totient is φ = 665022960.

The previous prime is 1170255649. The next prime is 1170255689. The reversal of 1170255681 is 1865520711.

The square root of 1170255681 is 34209.

It is a perfect power (a square), and thus also a powerful number.

1170255681 is a `hidden beast` number, since 1 + 1 + 70 + 25 + 568 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12895281 + 1157360400 = 3591^2 + 34020^2 .

It is a tau number, because it is divible by the number of its divisors (63).

It is not a de Polignac number, because 1170255681 - 2⁵ = 1170255649 is a prime.

It is a super-2 number, since 2×1170255681² = 2738996717825547522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1170255689) 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 62 ways as a sum of consecutive naturals, for example, 6465411 + ... + 6465591.

Almost surely, 2^1170255681 is an apocalyptic number.

1170255681 is the 34209-th square number.

1170255681 is the 17105-th centered octagonal number.

It is an amenable number.

1170255681 is a deficient number, since it is larger than the sum of its proper divisors (882126162).

1170255681 is an frugal number, since it uses more digits than its factorization.

1170255681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 36.

The cubic root of 1170255681 is about 1053.8049947869.

Multiplying 1170255681 by its sum of digits (36), we get a square (42129204516 = 205254²).

The spelling of 1170255681 in words is "one billion, one hundred seventy million, two hundred fifty-five thousand, six hundred eighty-one".