1006387 has 4 divisors (see below), whose sum is σ = 1041120. Its totient is φ = 971656.

The previous prime is 1006367. The next prime is 1006391. The reversal of 1006387 is 7836001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7836001 = 433 ⋅18097.

It is a cyclic number.

It is not a de Polignac number, because 1006387 - 2¹⁹ = 482099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1006307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17323 + ... + 17380.

It is an arithmetic number, because the mean of its divisors is an integer number (260280).

2^1006387 is an apocalyptic number.

1006387 is a deficient number, since it is larger than the sum of its proper divisors (34733).

1006387 is an equidigital number, since it uses as much as digits as its factorization.

1006387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34732.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1006387 is about 1003.1884169985. The cubic root of 1006387 is about 100.2124483374.

The spelling of 1006387 in words is "one million, six thousand, three hundred eighty-seven".