1069645 has 4 divisors (see below), whose sum is σ = 1283580. Its totient is φ = 855712.

The previous prime is 1069639. The next prime is 1069667. The reversal of 1069645 is 5469601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5469601 = 2111 ⋅2591.

It can be written as a sum of positive squares in 2 ways, for example, as 609961 + 459684 = 781^2 + 678^2 .

It is a cyclic number.

It is not a de Polignac number, because 1069645 - 2⁷ = 1069517 is a prime.

It is a super-3 number, since 3×1069645³ = 3671472257986533375, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106960 + ... + 106969.

It is an arithmetic number, because the mean of its divisors is an integer number (320895).

2^1069645 is an apocalyptic number.

It is an amenable number.

1069645 is a deficient number, since it is larger than the sum of its proper divisors (213935).

1069645 is an equidigital number, since it uses as much as digits as its factorization.

1069645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213934.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1069645 is about 1034.2364333169. The cubic root of 1069645 is about 102.2695994853.

The spelling of 1069645 in words is "one million, sixty-nine thousand, six hundred forty-five".