1087145 has 4 divisors (see below), whose sum is σ = 1304580. Its totient is φ = 869712.

The previous prime is 1087129. The next prime is 1087147. The reversal of 1087145 is 5417801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 652864 + 434281 = 808^2 + 659^2 .

It is a cyclic number.

It is not a de Polignac number, because 1087145 - 2⁴ = 1087129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108710 + ... + 108719.

It is an arithmetic number, because the mean of its divisors is an integer number (326145).

2^1087145 is an apocalyptic number.

It is an amenable number.

1087145 is a deficient number, since it is larger than the sum of its proper divisors (217435).

1087145 is an equidigital number, since it uses as much as digits as its factorization.

1087145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217434.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 1087145 is about 1042.6624573658. The cubic root of 1087145 is about 102.8243148286.

The spelling of 1087145 in words is "one million, eighty-seven thousand, one hundred forty-five".