1171487021 has 8 divisors (see below), whose sum is σ = 1180197600. Its totient is φ = 1162788048.

The previous prime is 1171486963. The next prime is 1171487041. The reversal of 1171487021 is 1207841711.

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 1171487021 - 2¹⁴ = 1171470637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171487041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365990 + ... + 369176.

It is an arithmetic number, because the mean of its divisors is an integer number (147524700).

Almost surely, 2^1171487021 is an apocalyptic number.

It is an amenable number.

1171487021 is a deficient number, since it is larger than the sum of its proper divisors (8710579).

1171487021 is a wasteful number, since it uses less digits than its factorization.

1171487021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5803.

The product of its (nonzero) digits is 3136, while the sum is 32.

The square root of 1171487021 is about 34226.9925789573. The cubic root of 1171487021 is about 1054.1744688603.

The spelling of 1171487021 in words is "one billion, one hundred seventy-one million, four hundred eighty-seven thousand, twenty-one".