1166487 has 8 divisors (see below), whose sum is σ = 1777536. Its totient is φ = 666552.

The previous prime is 1166483. The next prime is 1166497. The reversal of 1166487 is 7846611.

It is a happy number.

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

It is not a de Polignac number, because 1166487 - 2² = 1166483 is a prime.

It is a d-powerful number, because it can be written as 1 + 1 + 6² + 6³ + 4¹⁰ + 8 + 7⁶ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27753 + ... + 27794.

It is an arithmetic number, because the mean of its divisors is an integer number (222192).

2^1166487 is an apocalyptic number.

1166487 is a deficient number, since it is larger than the sum of its proper divisors (611049).

1166487 is an equidigital number, since it uses as much as digits as its factorization.

1166487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55557.

The product of its digits is 8064, while the sum is 33.

The square root of 1166487 is about 1080.0402770267. The cubic root of 1166487 is about 105.2672556870.

It can be divided in two parts, 1166 and 487, that added together give a triangular number (1653 = T₅₇).

The spelling of 1166487 in words is "one million, one hundred sixty-six thousand, four hundred eighty-seven".