1001287 has 8 divisors (see below), whose sum is σ = 1150496. Its totient is φ = 853632.

The previous prime is 1001279. The next prime is 1001291. The reversal of 1001287 is 7821001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1001287 - 2³ = 1001279 is a prime.

It is a Duffinian number.

1001287 is a modest number, since divided by 1287 gives 1 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001237) 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, 1963 + ... + 2419.

It is an arithmetic number, because the mean of its divisors is an integer number (143812).

2^1001287 is an apocalyptic number.

1001287 is a deficient number, since it is larger than the sum of its proper divisors (149209).

1001287 is an equidigital number, since it uses as much as digits as its factorization.

1001287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 1001287 is about 1000.6432930870. The cubic root of 1001287 is about 100.0428816090.

Adding to 1001287 its reverse (7821001), we get a palindrome (8822288).

The spelling of 1001287 in words is "one million, one thousand, two hundred eighty-seven".