1005906 has 16 divisors (see below), whose sum is σ = 2194848. Its totient is φ = 304800.

The previous prime is 1005883. The next prime is 1005911. The reversal of 1005906 is 6095001.

It is an Ulam number.

It is an unprimeable number.

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, 7555 + ... + 7686.

It is an arithmetic number, because the mean of its divisors is an integer number (137178).

2^1005906 is an apocalyptic number.

1005906 is an abundant number, since it is smaller than the sum of its proper divisors (1188942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1005906 is a wasteful number, since it uses less digits than its factorization.

1005906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15257.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 1005906 is about 1002.9486527236. The cubic root of 1005906 is about 100.1964803685.

It can be divided in two parts, 100 and 5906, that added together give a palindrome (6006).

The spelling of 1005906 in words is "one million, five thousand, nine hundred six".