1171000521 has 12 divisors (see below), whose sum is σ = 1693099200. Its totient is φ = 779903640.

The previous prime is 1171000507. The next prime is 1171000529. The reversal of 1171000521 is 1250001711.

It is a happy number.

It is not a de Polignac number, because 1171000521 - 2¹⁵ = 1170967753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1171000494 and 1171000503.

It is not an unprimeable number, because it can be changed into a prime (1171000529) 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 11 ways as a sum of consecutive naturals, for example, 53821 + ... + 72378.

It is an arithmetic number, because the mean of its divisors is an integer number (141091600).

Almost surely, 2^1171000521 is an apocalyptic number.

It is an amenable number.

1171000521 is a deficient number, since it is larger than the sum of its proper divisors (522098679).

1171000521 is a wasteful number, since it uses less digits than its factorization.

1171000521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127236 (or 127233 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 1171000521 is about 34219.8848770711. The cubic root of 1171000521 is about 1054.0285213367.

The spelling of 1171000521 in words is "one billion, one hundred seventy-one million, five hundred twenty-one", and thus it is an aban number.