1087591 has 2 divisors, whose sum is σ = 1087592. Its totient is φ = 1087590.

The previous prime is 1087589. The next prime is 1087621. The reversal of 1087591 is 1957801.

It is a weak prime.

It is an emirp because it is prime and its reverse (1957801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1087591 - 2¹ = 1087589 is a prime.

Together with 1087589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1087561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543795 + 543796.

It is an arithmetic number, because the mean of its divisors is an integer number (543796).

2^1087591 is an apocalyptic number.

1087591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087591 is an equidigital number, since it uses as much as digits as its factorization.

1087591 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1087591 is about 1042.8763109784. The cubic root of 1087591 is about 102.8383740923.

The spelling of 1087591 in words is "one million, eighty-seven thousand, five hundred ninety-one".