1087816 has 8 divisors (see below), whose sum is σ = 2039670. Its totient is φ = 543904.

The previous prime is 1087811. The next prime is 1087817. The reversal of 1087816 is 6187801.

It can be written as a sum of positive squares in only one way, i.e., 715716 + 372100 = 846^2 + 610^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1087811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67981 + ... + 67996.

2^1087816 is an apocalyptic number.

It is an amenable number.

1087816 is a deficient number, since it is larger than the sum of its proper divisors (951854).

1087816 is a wasteful number, since it uses less digits than its factorization.

1087816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135983 (or 135979 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 1087816 is about 1042.9841801293. The cubic root of 1087816 is about 102.8454653116.

The spelling of 1087816 in words is "one million, eighty-seven thousand, eight hundred sixteen".