1087749 has 20 divisors (see below), whose sum is σ = 1751596. Its totient is φ = 668736.

The previous prime is 1087747. The next prime is 1087753. The reversal of 1087749 is 9477801.

It can be written as a sum of positive squares in 2 ways, for example, as 656100 + 431649 = 810^2 + 657^2 .

It is not a de Polignac number, because 1087749 - 2¹ = 1087747 is a prime.

It is a Duffinian number.

1087749 is a lucky number.

It is a plaindrome in base 12.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087741) 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 in 19 ways as a sum of consecutive naturals, for example, 537 + ... + 1569.

2^1087749 is an apocalyptic number.

It is an amenable number.

1087749 is a deficient number, since it is larger than the sum of its proper divisors (663847).

1087749 is a wasteful number, since it uses less digits than its factorization.

1087749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058 (or 1049 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 1087749 is about 1042.9520602597. The cubic root of 1087749 is about 102.8433538063.

The spelling of 1087749 in words is "one million, eighty-seven thousand, seven hundred forty-nine".