1087566 has 16 divisors (see below), whose sum is σ = 2228688. Its totient is φ = 353600.

The previous prime is 1087561. The next prime is 1087589. The reversal of 1087566 is 6657801.

1087566 = 156² + 157² + ... + 191².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087561) 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, 1965 + ... + 2456.

It is an arithmetic number, because the mean of its divisors is an integer number (139293).

2^1087566 is an apocalyptic number.

1087566 is an abundant number, since it is smaller than the sum of its proper divisors (1141122).

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

1087566 is a wasteful number, since it uses less digits than its factorization.

1087566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4467.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1087566 is about 1042.8643248285. The cubic root of 1087566 is about 102.8375861187.

It can be divided in two parts, 1087 and 566, that added together give a triangular number (1653 = T₅₇).

The spelling of 1087566 in words is "one million, eighty-seven thousand, five hundred sixty-six".