1071987 has 8 divisors (see below), whose sum is σ = 1633536. Its totient is φ = 612552.

The previous prime is 1071979. The next prime is 1071991. The reversal of 1071987 is 7891701.

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

It is not a de Polignac number, because 1071987 - 2³ = 1071979 is a prime.

It is a super-2 number, since 2×1071987² = 2298312256338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071907) by changing a digit.

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, 25503 + ... + 25544.

It is an arithmetic number, because the mean of its divisors is an integer number (204192).

2^1071987 is an apocalyptic number.

1071987 is a deficient number, since it is larger than the sum of its proper divisors (561549).

1071987 is an equidigital number, since it uses as much as digits as its factorization.

1071987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51057.

The product of its (nonzero) digits is 3528, while the sum is 33.

The square root of 1071987 is about 1035.3680505018. The cubic root of 1071987 is about 102.3441852302.

The spelling of 1071987 in words is "one million, seventy-one thousand, nine hundred eighty-seven".