1017987 has 8 divisors (see below), whose sum is σ = 1404240. Its totient is φ = 655200.

The previous prime is 1017959. The next prime is 1017997. The reversal of 1017987 is 7897101.

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

It is not a de Polignac number, because 1017987 - 2⁶ = 1017923 is a prime.

1017987 is a lucky number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1017997) 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, 5764 + ... + 5937.

It is an arithmetic number, because the mean of its divisors is an integer number (175530).

2^1017987 is an apocalyptic number.

1017987 is a deficient number, since it is larger than the sum of its proper divisors (386253).

1017987 is a wasteful number, since it uses less digits than its factorization.

1017987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11733.

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

The square root of 1017987 is about 1008.9534181517. The cubic root of 1017987 is about 100.5960073617.

The spelling of 1017987 in words is "one million, seventeen thousand, nine hundred eighty-seven".