1039987 has 4 divisors (see below), whose sum is σ = 1120000. Its totient is φ = 959976.

The previous prime is 1039979. The next prime is 1039999. The reversal of 1039987 is 7899301.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1039987 - 2³ = 1039979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1039187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39987 + ... + 40012.

It is an arithmetic number, because the mean of its divisors is an integer number (280000).

2^1039987 is an apocalyptic number.

1039987 is a deficient number, since it is larger than the sum of its proper divisors (80013).

1039987 is an equidigital number, since it uses as much as digits as its factorization.

1039987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80012.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1039987 is about 1019.7975289242. The cubic root of 1039987 is about 101.3155182305.

The spelling of 1039987 in words is "one million, thirty-nine thousand, nine hundred eighty-seven".