1067665 has 4 divisors (see below), whose sum is σ = 1281204. Its totient is φ = 854128.

The previous prime is 1067653. The next prime is 1067669. The reversal of 1067665 is 5667601.

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 408321 + 659344 = 639^2 + 812^2 .

It is a cyclic number.

It is not a de Polignac number, because 1067665 - 2⁷ = 1067537 is a prime.

It is a super-2 number, since 2×1067665² = 2279817104450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1067669) 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 3 ways as a sum of consecutive naturals, for example, 106762 + ... + 106771.

It is an arithmetic number, because the mean of its divisors is an integer number (320301).

2^1067665 is an apocalyptic number.

It is an amenable number.

1067665 is a deficient number, since it is larger than the sum of its proper divisors (213539).

1067665 is an equidigital number, since it uses as much as digits as its factorization.

1067665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213538.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 1067665 is about 1033.2787619999. The cubic root of 1067665 is about 102.2064573900.

The spelling of 1067665 in words is "one million, sixty-seven thousand, six hundred sixty-five".