1067581 has 4 divisors (see below), whose sum is σ = 1072512. Its totient is φ = 1062652.

The previous prime is 1067569. The next prime is 1067593. The reversal of 1067581 is 1857601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1857601 = 761 ⋅2441.

It is an interprime number because it is at equal distance from previous prime (1067569) and next prime (1067593).

It is a cyclic number.

It is not a de Polignac number, because 1067581 - 2⁹ = 1067069 is a prime.

It is a super-2 number, since 2×1067581² = 2279458383122, which contains 22 as substring.

It is a Duffinian number.

1067581 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1067551) 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, 2125 + ... + 2578.

It is an arithmetic number, because the mean of its divisors is an integer number (268128).

2^1067581 is an apocalyptic number.

It is an amenable number.

1067581 is a deficient number, since it is larger than the sum of its proper divisors (4931).

1067581 is an equidigital number, since it uses as much as digits as its factorization.

1067581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4930.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 1067581 is about 1033.2381138924. The cubic root of 1067581 is about 102.2037769089.

The spelling of 1067581 in words is "one million, sixty-seven thousand, five hundred eighty-one".