1001387 has 2 divisors, whose sum is σ = 1001388. Its totient is φ = 1001386.

The previous prime is 1001381. The next prime is 1001389. The reversal of 1001387 is 7831001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001387 - 2⁶ = 1001323 is a prime.

Together with 1001389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1001381) 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 as a sum of consecutive naturals, namely, 500693 + 500694.

It is an arithmetic number, because the mean of its divisors is an integer number (500694).

2^1001387 is an apocalyptic number.

1001387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001387 is an equidigital number, since it uses as much as digits as its factorization.

1001387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 1001387 is about 1000.6932596955. The cubic root of 1001387 is about 100.0462119746.

Adding to 1001387 its reverse (7831001), we get a palindrome (8832388).

The spelling of 1001387 in words is "one million, one thousand, three hundred eighty-seven".