1005766 has 4 divisors (see below), whose sum is σ = 1508652. Its totient is φ = 502882.

The previous prime is 1005761. The next prime is 1005821. The reversal of 1005766 is 6675001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6675001 = 271 ⋅24631.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1005766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005761) 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 as a sum of consecutive naturals, namely, 251440 + ... + 251443.

It is an arithmetic number, because the mean of its divisors is an integer number (377163).

2^1005766 is an apocalyptic number.

1005766 is a deficient number, since it is larger than the sum of its proper divisors (502886).

1005766 is an equidigital number, since it uses as much as digits as its factorization.

1005766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502885.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 1005766 is about 1002.8788560938. The cubic root of 1005766 is about 100.1918317704.

It can be divided in two parts, 1005 and 766, that added together give a palindrome (1771).

The spelling of 1005766 in words is "one million, five thousand, seven hundred sixty-six".