1001986 has 16 divisors (see below), whose sum is σ = 1571328. Its totient is φ = 478800.

The previous prime is 1001983. The next prime is 1001989. The reversal of 1001986 is 6891001.

It is an interprime number because it is at equal distance from previous prime (1001983) and next prime (1001989).

It is a self number, because there is not a number n which added to its sum of digits gives 1001986.

It is not an unprimeable number, because it can be changed into a prime (1001981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5151 + ... + 5341.

It is an arithmetic number, because the mean of its divisors is an integer number (98208).

2^1001986 is an apocalyptic number.

1001986 is a deficient number, since it is larger than the sum of its proper divisors (569342).

1001986 is a wasteful number, since it uses less digits than its factorization.

1001986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1001986 is about 1000.9925074645. The cubic root of 1001986 is about 100.0661562239.

Adding to 1001986 its reverse (6891001), we get a palindrome (7892987).

The spelling of 1001986 in words is "one million, one thousand, nine hundred eighty-six".