1015987 has 8 divisors (see below), whose sum is σ = 1222400. Its totient is φ = 824904.

The previous prime is 1015981. The next prime is 1015991. The reversal of 1015987 is 7895101.

1015987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-1015987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1015981) 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, 3687 + ... + 3952.

It is an arithmetic number, because the mean of its divisors is an integer number (152800).

2^1015987 is an apocalyptic number.

1015987 is a deficient number, since it is larger than the sum of its proper divisors (206413).

1015987 is an equidigital number, since it uses as much as digits as its factorization.

1015987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7665.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 1015987 is about 1007.9618048319. The cubic root of 1015987 is about 100.5300851326.

It can be divided in two parts, 1015 and 987, that added together give a palindrome (2002).

The spelling of 1015987 in words is "one million, fifteen thousand, nine hundred eighty-seven".