1087866 has 24 divisors (see below), whose sum is σ = 2538900. Its totient is φ = 334656.

The previous prime is 1087861. The next prime is 1087873. The reversal of 1087866 is 6687801.

1087866 = T₁₇₈ + T₁₇₉ + ... + T₂₂₉.

It can be written as a sum of positive squares in 2 ways, for example, as 1071225 + 16641 = 1035^2 + 129^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1087866.

It is not an unprimeable number, because it can be changed into a prime (1087861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2091 + ... + 2558.

2^1087866 is an apocalyptic number.

1087866 is an abundant number, since it is smaller than the sum of its proper divisors (1451034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1087866 is a wasteful number, since it uses less digits than its factorization.

1087866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4670 (or 4667 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1087866 is about 1043.0081495367. The cubic root of 1087866 is about 102.8470410053.

It can be divided in two parts, 1087 and 866, that added together give a triangular number (1953 = T₆₂).

The spelling of 1087866 in words is "one million, eighty-seven thousand, eight hundred sixty-six".