1087489 has 4 divisors (see below), whose sum is σ = 1171156. Its totient is φ = 1003824.

The previous prime is 1087487. The next prime is 1087517. The reversal of 1087489 is 9847801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9847801 = 31 ⋅317671.

It can be written as a sum of positive squares in 2 ways, for example, as 47089 + 1040400 = 217^2 + 1020^2 .

It is a cyclic number.

It is not a de Polignac number, because 1087489 - 2¹ = 1087487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1087483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41814 + ... + 41839.

It is an arithmetic number, because the mean of its divisors is an integer number (292789).

It is a Proth number, since it is equal to 531 ⋅ 2¹¹ + 1 and 531 < 2¹¹.

2^1087489 is an apocalyptic number.

It is an amenable number.

1087489 is a deficient number, since it is larger than the sum of its proper divisors (83667).

1087489 is an equidigital number, since it uses as much as digits as its factorization.

1087489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83666.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 1087489 is about 1042.8274066211. The cubic root of 1087489 is about 102.8351590841.

The spelling of 1087489 in words is "one million, eighty-seven thousand, four hundred eighty-nine".